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简算题及答案
(29分之2+23分之3)x29x23 2.5x32+12.5
人气:420 ℃ 时间:2020-02-20 17:42:18
解答
(2/29+3/23)x29x23
=2/29×29×23+3/23×29×23
=46+87
=133
2.5x32+12.5
=2.5×4×8+12.5
=10×8+12.5
=80+12.5
=92.5
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