0.54乘0.54+0.54乘0.46 15.7乘9.9+1.57 简便计算
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/06/15 23:40:36
0.54乘0.54+0.54乘0.46 15.7乘9.9+1.57 简便计算
![0.54乘0.54+0.54乘0.46 15.7乘9.9+1.57 简便计算](/uploads/image/z/17498046-30-6.jpg?t=0.54%E4%B9%980.54%2B0.54%E4%B9%980.46+15.7%E4%B9%989.9%2B1.57+%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97)
gaofei494 ,
0.54×0.54+0.54×0.46
=0.54×(0.54+0.46)
=0.54×1
=0.54
15.7×9.9+1.57
=1.57×99+1.57
=1.57×(99+1)
=1.57×100
=157
0.54×0.54+0.54×0.46
=0.54×(0.54+0.46)
=0.54×1
=0.54
15.7×9.9+1.57
=1.57×99+1.57
=1.57×(99+1)
=1.57×100
=157