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0.7乘以11分之3减去6.6乘以7分之3减去1.1乘以7分之3加上0.7乘以11分之8等于?
人气:421 ℃ 时间:2019-08-19 19:22:26
解答
0.7*3/11 - 6.6*3/7 -1.1* 3/7+0.7*8/11
=0.7*(3/11+8/11)-3/7 *(6.6+1.1)
=0.7-3.3
=-2.6
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