简便计算:(1)4.56×0.27+4.56×0.63+0.456 (2)5.85+6.13+3.87-1.85 (3)
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/10/01 02:14:04
简便计算:(1)4.56×0.27+4.56×0.63+0.456 (2)5.85+6.13+3.87-1.85 (3)12.5×5.7×8-5.7×90
4.56×0.27+4.56×0.63+0.456
=4.56×(0.27+0.63+1)
=4.56×2
=9.12
5.85+6.13+3.87-1.85
=5.85-1.85+6.13+3.87
=4+10
=14
12.5×5.7×8-5.7×90
=100×5.7-5.7×90
=5.7×(100-90)
=5.7×10
=57
再问: 第一题错了
再答: 4.56×0.27+4.56×0.63+0.456 =4.56×(0.27+0.63+0.1) =4.56×1 =4.56
再问: 还有第三题
再答: 第三题对的
再问: 看错了,嘻嘻。不过,谢谢!
=4.56×(0.27+0.63+1)
=4.56×2
=9.12
5.85+6.13+3.87-1.85
=5.85-1.85+6.13+3.87
=4+10
=14
12.5×5.7×8-5.7×90
=100×5.7-5.7×90
=5.7×(100-90)
=5.7×10
=57
再问: 第一题错了
再答: 4.56×0.27+4.56×0.63+0.456 =4.56×(0.27+0.63+0.1) =4.56×1 =4.56
再问: 还有第三题
再答: 第三题对的
再问: 看错了,嘻嘻。不过,谢谢!
简便计算:(1)4.56×0.27+4.56×0.63+0.456 (2)5.85+6.13+3.87-1.85 (3)
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