0.1×0.2×0.3×0.4×0.5×0.6×0.7×0.8×0.9怎么巧算
答案:2 悬赏:0 手机版
解决时间 2021-03-24 17:48
- 提问者网友:且恨且铭记
- 2021-03-24 04:31
0.1×0.2×0.3×0.4×0.5×0.6×0.7×0.8×0.9怎么巧算
最佳答案
- 五星知识达人网友:煞尾
- 2021-03-24 05:33
第一步:计算1×2×3×4×5×6×7×8×9=362880
第二步:查看共有几位小数:9位
第三部:从右往左数九位,不足的位用0代替,确定小数点位置,结果:0.000362880
第二步:查看共有几位小数:9位
第三部:从右往左数九位,不足的位用0代替,确定小数点位置,结果:0.000362880
全部回答
- 1楼网友:玩世
- 2021-03-24 07:07
(1)1.2×0.4+1.3×0.4, =(1.2+1.3)×0.4, =2.5×0.4, =1; (2)(1.25+0.36)×0.2, =1.25×0.2+0.36×0.2, =0.25+0.072, =0.322; (3)7.2×0.3+28×0.03, =72×0.03+28×0.03, =(72+28)×0.03, =100×0.03, =3; (4)0.25×0.56×0.4, =0.25×0.4×0.56, =0.1×0.56, =0.056; (5)8×(2.5+0.125), =8×2.5+8×0.125, =20+1, =21; (6)0.25×0.56×0.4, =0.25×0.4×0.56, =0.1×0.56, =0.056; (7)32.8+5.6+7.2, =32.8+7.2+5.6, =40+5.6, =45.6; (8)75.2-66.9-5.2, =75.2-5.2-66.9, =70-66.9, =3.1.
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