12x2.5+5x3.8怎样简便怎么算
答案:6 悬赏:10
解决时间 2021-01-04 17:54
- 提问者网友:练爱
- 2021-01-04 04:07
12x2.5+5x3.8怎样简便怎么算
最佳答案
- 二级知识专家网友:千夜
- 2021-01-04 05:14
12x2.5+5x3.8
=12x0.5x5+5x3.8
=5x(6+3.8)
=5x9.8
=49追答发过去了,望采纳
=12x0.5x5+5x3.8
=5x(6+3.8)
=5x9.8
=49追答发过去了,望采纳
全部回答
- 1楼网友:酒醒三更
- 2021-01-04 09:02
12×2.5+5÷2x3.8×2=12×2.5+2.5x7.6=2.5x(12+7.6)=2.5x19.6=2.5x(19.6+0.4-0.4)=2.5×20-2.5×0.4=50-1=49
- 2楼网友:蓝房子
- 2021-01-04 07:50
12x2.5+5x3.8
=6*5+10*1.9
=30+19
=49
=6*5+10*1.9
=30+19
=49
- 3楼网友:玩世
- 2021-01-04 06:51
12×2.5 + 5×3.8
= 5×6 + 5×3.8
= 5×9.8
= 5×10 - 1
= 49
= 5×6 + 5×3.8
= 5×9.8
= 5×10 - 1
= 49
- 4楼网友:舍身薄凉客
- 2021-01-04 05:47
9.8*5=49
- 5楼网友:痴妹与他
- 2021-01-04 05:32
12x2.5+5x3.8
=6x5+5x3.8
=5x(6+3.8)
=5x9.8
=49
=6x5+5x3.8
=5x(6+3.8)
=5x9.8
=49
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