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简便计算3.08x101-----------12.7x5.3+5.3x7.3-----------1.25x0.4x8x0.25------------33.3x7+99.9
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简便计算
3.08x101-----------12.7x5.3+5.3x7.3-----------1.25x0.4x8x0.25------------33.3x7+99.9
3.08x101-----------12.7x5.3+5.3x7.3-----------1.25x0.4x8x0.25------------33.3x7+99.9
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答案和解析
3.08x101=3.08×100+3.08=308+3.08=311.0812.7x5.3+5.3x7.3=（12.7+7.3）×5.3=20×5.3=1061.25x0.4x8x0.25=（1.25×8）×（0.4×0.25）=10×0.1=133.3x7+99.9=33.3+33.3×3=33.3×（7+3）=33.3×10=333
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