第1天

8.78-0.52= 1.27+0.31= 8.42-7.04= 16.76+6.61= 0.41+0.95=

4.15+7.08= 2.59+9.10= 3.51+9.00= 4.54+2.55= 8.70+1.16=

1.31+5.61= 7.21-0.77= 8.64-7.85= 8.68+0.84= 2.62+3.19=

5.93-1.20= 3.66+5.90= 6.14-2.01= 5.58+0.13= 5.15-4.79=

第2天

5.29+6.33= 5.86-1.95= 3.79-3.47= 8.89-0.20= 7.42+9.92=

3.58-2.87= 7.31-2.51= 8.81-5.75= 6.67-2.72= 3.04+5.71=

1.73+4.32= 4.47+9.24= 8.53+3.94= 8.36-3.72= 6.78-1.84=

6.35-2.83= 4.36+7.50= 7.57+6.82= 5.18+2.34= 8.74-6.93=

第3天

7.96+2.29= 4.58+5.79= 1.05+9.02= 4.30-4.19= 4.94-2.06=

7.93-4.75= 6.03-2.94= 4.62+3.02= 9.32+3.40= 5.43+3.23=

3.55+5.33= 8.21-4.90= 2.38+2.40= 9.28+1.69= 6.89-0.88=

4.97+7.29= 3.34+4.51= 6.29+0.67= 9.60+0.73= 2.23+5.50=

第4天

9.81-0.09=

2.80+6.46= 7.74+1.48= 4.22-2.66= 8.28+7.36=

7.48-6.52= 4.64-3.25= 5.62+2.82= 6.63+7.16= 5.94-0.36=

8.80+7.97= 7.87+9.72= 8.76+0.75= 7.37-4.92= 7.52-1.82=

3.42+6.99= 4.06+4.85= 7.55+7.05= 9.40-8.83= 7.41-2.14=

第5天

2.53+4.77= 8.23-2.35= 4.45+6.35= 1.00+4.02= 5.20-1.50=

27.38+4.83= 26.75+2.83= 3.64-2.58= 6.52-3.44= 15.31+13.51=

5.5+4.5= 3.27-2.49= 11.65-7.39= 19.01-7.99= 7.51+0.49=

5.48-3.25=

4.8+18.9= 10.3+58.7=

8.03-4.56= 9.03-8.57=

第6天

8.25+1.55= 9.43-9.05= 1.75+2.08=

4.28-3.37=

4.13+2.24=

4.17+2.53= 5.07-0.98= 5.67-0.73=

13.18+5.27= 5.16+7.89=

26.8+3.02= 6.07-4.993= 3.7+2.36=

15.4+2.97= 10.2-8.75=

7.3-2.25=

3.8+3.54= 3.05-2.9=

3.1-2.07= 12.7+6.58=

第7天

7.81-3.735= 12.16+5.347= 0.4-0.125= 18.7+3.96= 9.6+4.78=

5.67-0.845= 0.506-0.19= 11.04-7.3= 1.4-0.405= 62.1-17.07=

1.4-0.405= 3.906+0.66= 43.5-27.34= 15.98-3.9= 75.6-3.55=

5.94+10.7= 12.03+0.875= 37.8+3.02= 0.704-0.25= 10.1-0.55=

第8天

27+8.03=

26+7.98=

13.99+1=

7.88+2 =

28-3.56=

10-0.81=

10-0.36=

20-0.92=

8-7.089=

95-9.85=

20-9.42=

35.09-11=

96.85-85=

45.45-45=

10-0.41=

45-0.45=

3.57+3=

1.5-0.5=

1-0.9=

2.3＋0.6=

第9天

0.9＋0.8=

1-0.3=

3.4-1.5=

1.9-0.9=

3.5-2.4=

0.36+0.64= 

3.5+ 4.2=

6 -0.5=

2.7-0.4= 

0.8+ 0.7=

4.5-3=

7.8-1.1= 

1.5－0.5=

1－0.9=

2.3＋0.6=

0.9＋0.8=

1.9－0.9=

3.5 -2.4=

0.36＋0.64=

0.96－0.3=

第10天

8.65－6.31= 

2.5+0.9=

1.2-0.5=

7.8+1.6=

0.39+0.15=

3-1.4=

4.7-2.8=

7.2-6.45=

15-0.48=

6.77-1.78=

3.45+5.75= 3.40+58.20= 49.80+49.20=

111.6-99=

7.8+21.02=

5.6-1.42=

12.5+0.9=

4.5-2.83=

3.75+2.25=

2.98+0.56=

第11天

12.53+4.67=

6.07+4.89=

5.64-1.78=

10.2-6.45=

5-0.41=

0.3+1.5=

2.5+9.8=

7.6+1.3=

4.4+5.7=

2.3+7.7=

5.7+3.1=

7.69+2.31=

9.16+2.64=

5.68+12.22=

16.8+16.5=

26.3+14.6=

6.9+3.4= 

52.3+64.7=

12.75-5.3=

8.24+16.93=

第12天

0.75＋0.4=

20＋0.78=

4.8＋4.2=

5.7－3=

4.9－1.7=

1.34＋0.8=

2－0.75=

8.7＋0.03=

0.2－0.09=

8.5＋2.5=

2.4－1.4=

0.68＋0.42=

7.82－7.2=

2＋9.1=

0.48＋0.52=

8.1－5.1=

0.78－0.24=

0.8＋0.18=

0.89－0.25=

1－0.98=

第13天

0.9＋0.1=

1－0.8=

4.5－4=

5.6＋4=

10－4.4=

6＋6.6=

9.5－2.7=

1－0.55=

3.7＋4.8=

7＋3.3=

3．25＋0．75=

2.7＋3.9=

0．7＋0．9=

0.9＋1=

14．6－0．4=

10－0．1=

14＋0．78=

3＋2.7=

5－0．08=

1．64＋2．35=

第14天

1．1－1=

8．34－6．22=

1.3＋4.3=

7.2＋6.9=

9.3－8.8=

4.4＋15.99=

19.8－5.6=

96.3－56.2 =

79.2＋56.8=

1.9＋25.793=

88－69.21= 

136.5－105=

73.4+52.1=

93.1-20.9=

63.1-11=

0.33+9.8=

7.8+6.9=

0.2+2.7=

5.6+4.4=

9.4+0.06=

第15天

0.7+0.4=

0.5－0.45=

10－0.1= 

1.8－0.9=

12.6－1.2=

17+0.33=

1.01+0.6=

7－0.05=

9－0.26= 

6.14+3.83=

7.93-1.64=

5.23-2.36= 

3.44+3.36=

8.63-3.48=

1.16+4.77=

7.74-5.85=

9.35-4.74=

4.93+4.75=

8.17-5.26=

2.26-0.86=

第16天

6.55+4.68=

1.1+4.5=

1.9+3.4=

3.45+4.6=

4.45+4.5=

9.4-2.75=

7.3-1.26=

3.83+5.55=

2.75+1.3=

7.6-2.15=

1.9+6.2=

7.1-6.6=

6.8-2.8=

44.4+1.4=

1.7+9.66= 43.3+6.3= 

55.5-1.9=

38.9-5.55= 64.41+8.67= 

0.7＋0.9=

第17天

3.8＋0.6=

8.24+3.76= 

4.1－3.8=

14＋0.78=

14.6-0.34= 

1.3+8.56=

0.8-0.55=

1-0.03=

30.5+3.05=

0.8-0.45=

3.25＋0.75=

0.78+2.2=

5-0.08=

10-0.1=

10－7.64=

13.6＋8.46=

0.99＋1.1=

1.23+6.52=

5.32-0.93=

6.35-5.23=

第18天

1.23+5.69=

1.26+5.21=

0.96-0.23=

7.26-4.93=

2.16-0.23=

4.63+8.9=

9.28+7.32=

5.2-0.9=

2.65+9.32= 

7.65-6.23=

8.28+4.75=

9.23+5.45=

6.23-4.53=

8.52+4.65=

5.2+2.63=

4.62+8.95=

7.24+6.21=

3.8-2.3= 

0.7＋0.9=

0.8＋0.6=

第19天

8.24＋3.76=

4.1－3.8=

14＋0.78=

14.6－0.34=

1.3＋8.56=

0.8－0.55=

10－0.1=

4－0.04=

1－0.03=

30.5＋3.05=

0.8－0.45=

0.78＋2.2=

5－0.08=

3.25＋0.75=

8.65－6.31=

10－7.64= 

13.6＋8.46=

0.99＋1.1= 3.17+3.43= 

6.82+15.55=

第20天

34.85 - 11.73 =

75.80 + 59.35 =

50.10 - 48.60 =

91.91 - 75.10 =

53.73 - 31.75 =

64.48 - 14.42 =

39.03 - 14.98 =

28.36 - 24.00 =

61.83 + 69.95 =

65.36 - 38.06 =

29.37 - 18.02 =

42.09 - 32.46 =

64.39 + 40.78 =

18.08 + 34.00 =

47.63 - 31.59 =

17.42 - 10.44 =

16.24 - 14.18 =

55.89 - 28.75 =

67.23 - 19.17 =

22.04 + 80.13 =

第21天

1.2－0.12=

1－0.385=

3.2－2.3=

0.76－0.38=

15－7.3=

2.1+0.2=

0.3+0.7=

3.6+1.6=

7.5-0.5=

2.13-0.02=

3.51+0.2=

102+0.3=

1.12-1.02=

4.5-0.01=

1.9-0.4=

3.14 - 2.33 =

5.15 + 9.71 =

8.37 + 8.19 =

3.61 - 1.64 =

2.91 - 1.78 =

第22天

7.84 - 1.52 =

6.86 + 3.33 =

2.15 + 9.08 =

4.3 - 3.02 =

2.12 + 6.52 =

6.52 - 6.41 =

8.51 - 3.54 =

7.34 - 1.67 =

9.66 - 1.72 =

4.94 + 2.59 =

1.95 + 8.08 =

1.84 - 1.84 =

2.74 + 8.8 =

3.14 - 2.41 =

2.13 + 4.01 =

9.41 + 5.76 =

8.66 - 2.83 =

6.94 - 6.53 =

3.5 - 2.76 =

9.86 - 8.23 =

第23天

7.79 - 5.83 =

4.3 + 4.1 =

4.17 + 9.86 =

3.78 - 2.13 =

5.28 - 4.32 =

9.43 + 3.41 =

6.95 + 3.18 =

9.04 - 3.61 =

1.86 + 4.36 =

3.91 + 9.77 =

8.19 - 2.65 =

8.31 + 5.23 =

7.34 + 4.27 =

4.85 - 2.05 =

1.57 - 1.23 =

2.8 + 1.5 =

6.63 + 5.23 =

66.54 - 15.7 =

21.97 + 56.16 =

61.14 + 33.59 =

第24天

93.24 - 67.69 =

45.37 - 19.21 =

23.33 - 15.75 =

38.59 - 36.15 =

86.32 - 34.9 =

12.95 + 83.64 =

84.76 - 16.52 =

24.42 - 23.35 =

11.12 - 10.15 =

94.64 - 13.78 =

97.07 + 9.25 =

76.87 - 33.61 =

88.82 - 28.33 =

79.65 - 44.07 =

58.82 - 54.89 =

64.43 + 10.14 =

54.98 - 47.09 =

35.63 + 26.27 =

48.33 + 12.01 =

99.13 + 9.5 =

第25天

51.51 - 36.56 =

85.85 - 72.41 =

94.23 + 7.53 =

87.93 + 10.39 =

62.78 + 14.35 =

79.45 - 37 =

63.25 + 35.62 =

19.5 - 19.14 =

24.09 + 61.51 =

97.41 + 3.31 =

96.82 - 54.49 =

14.9 - 10.19 =

36.56 - 15.66 =

75.51 - 47.05 =

83.36 - 77.9 =

27.9 + 59.04 =

77.51 - 39.11 =

41.69 + 25.99 =

16.04 + 50.21 =

7.03 - 5.09 =

第26天

4.44 - 1.83 =

1.56 + 9.02 =

9.3 - 6.4 =

8.06 + 2.5 =

5.02 - 1.33 =

3.93 - 1.7 =

6.01 - 2.49 =

8.54 - 5.73 =

6.71 + 7.47 =

5.34 + 9.63 =

9.13 - 4.82 =

7.23 - 1.27 =

6.76 - 6.29 =

3.48 - 1.11 =

6.88 + 5.67 =

6.02 + 7.35 =

4.69 + 1.4 =

5.14 + 5.48 =

2.32 + 9.24 =

4.41 + 7.73 =

第27天

1.76 - 1.02 =

9.78 + 6.01 =

4.05 - 1.4 =

6.85 + 5.52 =

3.17 + 8.75 =

8.64 - 7.78 =

6.99 + 5.11 =

1.62 + 3.44 =

4.88 - 1.76 =

7.67 + 1.56 =

2.86 - 2.5 =

4.99 - 3.11 =

2 + 9.32 =

2.82 + 2.84 =

2.54 + 8.14 =

8.09 + 3.52 =

4.23 + 2.15 =

4.37 - 2.95 =

5.56 - 2.42 =

9.65 - 4.05 =

第28天

9.88 - 7.81 =

66.29 + 27.15 =

68.55 + 21.42 =

47.87 + 46.9 =

69.41 + 25.29 =

25.45 - 16.34 =

30.31 - 30.25 =

21.9 + 62.18 =

98.52 - 58.64 =

89.39 - 57.57 =

26 - 20.56 =

54 - 44.22 =

51.1 + 24.48 =

10.23 - 10.11 =

38.16 + 34.93 =

51.75 + 10.02 =

56.29 + 40.09 =

94.6 + 6.33 =

84.72 - 53.34 =

42.44 + 49.35 =

第29天

17.3 + 25.13 =

77.22 + 18.19 =

79.38 + 11.15 =

55.31 - 22.88 =

76.66 - 52.53 =

61.16 - 55.76 =

70.59 + 11.67 =

24.85 + 55.96 =

10.56 + 56 =

71.68 + 19.85 =

57.48 + 22.99 =

72.31 + 22.74 =

96.66 + 7.15 =

88.25 + 11.38 =

85.37 + 11.56 =

53.02 - 11.37 =

43.34 + 20.21 =

21.72 - 14.89 =

77.48 - 74.53 =

38.3 - 20.16 =

第30天

12.5 + 74.88 =

15.91 - 10.08 =

82.65 + 12.55 =

3.99 + 5.87 =

3.1 + 1.5 =

5.99 - 1.68 =

4.86 + 2.93 =

1.51 + 4.59 =

3.61 - 3.19 =

7.38 - 4.02 =

3.83 - 2.44 =

3.62 + 5.2 =

9.83 - 4.3 =

5.05 - 3.75 =

4.86 + 6.41 =

5.75 - 2.52 =

8.7 - 2.27 =

2.24 + 4.16 =

9.76 - 7.75 =

7.19 + 7.13 =

第31天

1.39 + 9.9 =

7.61 - 6.4 =

4.3 + 7.54 =

1.26 + 6.82 =

2.06 - 1.14 =

6.52 - 1.66 =

6.78 - 3.09 =

3.32 - 1.41 =

8.27 + 7.55 =

1.28 + 1.04 =

5.34 + 3.49 =

6.87 + 5.21 =

7.34 + 2.82 =

4.05 + 4.26 =

7.41 - 1.74 =

2.49 + 7.68 =

7.39 - 4.54 =

9.66 - 9.43 =

3.54 + 9.56 =

3.37 - 2.14 =

第32天

4.74 - 4.51 =

9 - 8.31 =

3.19 - 1.62 =

1.15 - 1.08 =

6.22 - 2 =

6.22 - 2.26 =

3.3 + 8.05 =

7.79 - 4.95 =

3.76 + 9.9 =

9.84 + 9.59 =

2.11 - 2.11 =

4.19 - 2.63 =

5.14 + 6.27 =

4.75 + 2.72 =

4.7 - 2.56 =

1.31 + 5.23 =

5.2 + 1.98 =

7.33 - 2.02 =

3.73 - 2.44 =

5.22 + 3.36 =

第33天

4.1 + 3.53 =

8.87 + 2.18 =

2.28 - 1.87 =

1.33 + 3.93 =

3.13 - 1.82 =

6.22 + 8.24 =

6.06 - 2.54 =

6.73 + 5.92 =

3.11 - 1.79 =

5.05 + 1.06 =

7.35 - 3.67 =

8.85 + 5.61 =

1.09 - 1.07 =

4.41 + 7.09 =

1.4 - 1.37 =

3.23 + 6.28 =

5.03 + 7.86 =

8.9 + 9.85 =

9.36 - 7.74 =

9.88 + 4.22 =

第34天

4.72 + 8.33 =

3.98 - 1.02 =

8.51 - 4.95 =

4.36 - 3.76 =

9.69 - 2.97 =

2.47 - 1.13 =

7.44 + 5.77 =

7.13 + 5.1 =

4.66 + 4.59 =

4.87 - 2.54 =

1.05 - 1.02 =

1.88 - 1.31 =

2.12 + 3.92 =

6.85 + 7.38 =

8.02 - 4.16 =

1.24 + 1.51 =

3.5 + 9.89 =

4.5 + 1.06 =

1.11 - 1.09 =

6.02 - 5.73 =

第35天

7.2 + 7.48 =

7.47 - 5.57 =

3.14 - 1.13 =

3.29 + 3.12 =

8.76 + 9.72 =

3.53 - 3.18 =

7.94 - 3.38 =

5.46 + 5.62 =

9.91 - 2.46 =

9.84 + 5.19 =

9.6 - 7.31 =

6.68 - 5.33 =

4.2 + 8.62 =

2.88 - 2.37 =

8.38 - 7.21 =

5.79 - 3.19 =

4.47 + 5.7 =

9.3 - 3.02 =

8.29 - 4.87 =

4.92 + 8.68 =

第36天

8.46 + 7.07 =

9.02 + 5.96 =

7.51 + 2.51 =

1.24 - 1.19 =

4.16 + 3.3 =

7.22 - 5.32 =

9.88 - 4.4 =

6.87 + 2.01 =

2.95 + 4.47 =

2.34 - 1.61 =

5.38 + 8.77 =

3.32 - 3.1 =

4.87 + 5.33 =

4.26 - 3.69 =

3.06 - 1.12 =

8.47 - 3.04 =

1.51 - 1.05 =

4.87 - 2.58 =

3.55 + 6.19 =

9 - 6.67 =

第37天

3.71 + 4.82 =

3.16 - 2.03 =

3.92 - 1.67 =

2.78 + 1.07 =

8.11 - 5.53 =

8.83 + 9.99 =

3.03 + 5.3 =

7.35 + 7.53 =

3.22 - 2.26 =

56.8 - 31.52 =

93.85 + 7.24 =

71.21 - 11.55 =

88.47 - 14.37 =

61.2 + 11.02 =

66.3 + 25.6 =

25.98 + 13.56 =

50.08 - 17.81 =

79.72 + 19.82 =

67.9 + 25.97 =

88.33 - 60.72 =

第38天

23.17 - 16.31 =

37.28 + 27.01 =

64.72 - 11.23 =

20.55 + 32.14 =

75.07 + 19.35 =

70.02 + 14.72 =

81.24 - 67.79 =

27.82 + 63.03 =

37.51 - 16.4 =

67.46 + 18.45 =

85.88 + 11.61 =

70.1 + 11.3 =

23.34 - 19.27 =

77.06 - 58.9 =

80.95 + 15.39 =

28.37 + 31.06 =

98.6 - 35.74 =

97.43 - 76.22 =

10.41 - 10.37 =

13.02 - 10.8 =

第39天

81.61 - 57.39 =

95.15 - 12.81 =

42 + 29 =

58 + 21.08 =

22.37 + 71.45 =

45.46 + 14.71 =

21.81 + 54.56 =

63.88 - 62.64 =

91.1 + 9.49 =

51.96 + 26.04 =

48.25 + 21.8 =

35.84 + 11.07 =

21.71 - 12.99 =

18.34 - 11.23 =

23.57 + 35.34 =

34.78 + 61.74 =

96.48 + 8.5 =

77.05 - 63.07 =

84.23 - 40.5 =

76.81 - 11.58 =

第40天

26.52 - 17.86 =

6、化学变化伴随的现象有改变颜色、发光发热、产生气体、产生沉淀物。57.4 + 32.9 =

42.44 + 52.88 =

36.39 - 14.63 =

一、填空：76.71 - 24.85 =

1、说说你身边物质变化的例子。51.35 + 14.46 =

58.75 + 19.37 =

二、问答题：36.16 - 23.49 =

答：最有效的方法就是集焚烧、堆肥、热解、制砖、发电等一体的统合系统，但是焚烧垃圾对空气有污染。15.73 + 81.4 =

44.48 - 20.93 =

1、我们每天都要消耗食物和各种各样的生活用品，与此同时，也产生了许多垃圾。89.41 - 36.45 =

33.48 + 56.42 =

19、阳光、空气、水、土壤、岩石、植物、动物……构成了我们周围的环境。我们人类也是环境中的一部分，我们都生活在一不定的环境之中。人与自然和谐相处，共同发展，是我们共同的责任。10.24 + 43.15 =

37.87 + 60.93 =

7、月球的明亮部分，上半月朝西，下半月朝东。91.03 + 9.81 =

答：①利用微生物的作用，我们可以生产酒、醋、酸奶、馒头和面包等食品。②土壤中的微生物可以分解动植物的尸体，使它们变成植物需要的营养素。③在工业生产和医药卫生中也都离不开微生物。88.76 + 10.31 =

65.44 - 15.54 =

10.98 - 10.3 =

答：①尽可能地不使用一次性用品；②延长物品的使用寿命；③包装盒纸在垃圾中比例很大，购物时减少对它们的使用。23.03 + 48.95 =

90.51 + 9.93 =

四年级小数加减法口算800题