1.6x4.5x12.5巧算
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解决时间 2021-04-16 18:52
- 提问者网友：未信
- 2021-04-16 02:54
1.6x4.5x12.5巧算
最佳答案
- 五星知识达人网友：轻熟杀无赦
- 2021-04-16 03:04
1.6x4.5x12.5
=0.2x8x4.5x12.5
=(0.2x4.5)x(8x12.5)
=0.9x100
=90
=0.2x8x4.5x12.5
=(0.2x4.5)x(8x12.5)
=0.9x100
=90
全部回答
- 1楼网友：行路难
- 2021-04-16 06:06
1.6x4.5x12.5巧算
1.6x4.5x12.5
=4x0.4x5x0.9x5x2.5
=【（0.4x2.5）x（4x5）x5】x0.9
=【1x20x5】x0.9
=100x0.9
=90
1.6x4.5x12.5
=4x0.4x5x0.9x5x2.5
=【（0.4x2.5）x（4x5）x5】x0.9
=【1x20x5】x0.9
=100x0.9
=90
- 2楼网友：一叶十三刺
- 2021-04-16 05:52
9.9×[15.8÷﹙1.6×0.125﹚]=9.9×[15.8÷﹙0.2×8×0.125﹚]=9.9×[15.8÷﹙0.2×1﹚]=9.9×[15.8÷0.2]=9.9×79=10×79－0.1×79=790－7.9=782.1
- 3楼网友：举杯邀酒敬孤独
- 2021-04-16 04:26
＝8/5+9/2+25/2
＝2*9*5
＝90
＝2*9*5
＝90
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