四年级脱式计算题500道
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1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷6
6.4/7×5/9+3/7×5/97.5/2-〔3/2+4/5〕8.7/8+〔1/8+1/9〕9.9×5/6+5/610.3/4×8/9-1/311.7×5/49+3/1412.6×〔1/2+2/3〕13.8×4/5+8×11/514.31×5/6–5/6
15.9/7-〔2/7–10/21〕16.5/9×18–14×2/717.4/5×25/16+2/3×3/418.14×8/7–5/6×12/1519.17/32–3/4×9/2420.3×2/9+1/321.5/7×3/25+3/722.3/14××2/3+1/623.1/5×2/3+5/624.9/22+1/11÷1/225.5/3×11/5+4/326.45×2/3+1/3×1527.7/19+12/19×5/628.1/4+3/4÷