题目内容
【题目】脱式计算。
0.65×101-65% -(35%+)÷1.2 62.5×(8.3-2.5×0.12)
【答案】65; 0.25; 500
【解析】
0.65×101-65%,65%变成0.65再根据乘法分配律进行简算。
-(35%+)÷1.2,把分数改写成小数,再按四则混合运算的顺序计算。
62.5×(8.3-2.5×0.12),根据乘法结合律2.5×0.12变成2.5×0.4×0.3,再按四则混合运算的顺序计算。
0.65×101-65%
=0.65×101-0.65
=0.65×(101-1)
=0.65×100
=65
-(35%+)÷1.2
=0.75-(0.35+0.25)÷1.2
=0.75-0.6÷1.2
=0.75-0.5
=0.25
62.5×(8.3-2.5×0.12)
=62.5×(8.3-2.5×0.4×0.3)
=62.5×(8.3-0.3)
=62.5×8
=500
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