(99×37+9×63) 用乘法分配律计算
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:2024/07/30 22:42:56
(99×37+9×63) 用乘法分配律计算
![(99×37+9×63) 用乘法分配律计算](/uploads/image/z/17980756-52-6.jpg?t=%2899%C3%9737%2B9%C3%9763%29+%E7%94%A8%E4%B9%98%E6%B3%95%E5%88%86%E9%85%8D%E5%BE%8B%E8%AE%A1%E7%AE%97)
99×37+9×63
=90×37+9×37+9×63
=90×37+9×(37+63)
=90×37+9×100
=90×37+90×10
=90×47
=47×100-47×10
=4700-470
=4230
=90×37+9×37+9×63
=90×37+9×(37+63)
=90×37+9×100
=90×37+90×10
=90×47
=47×100-47×10
=4700-470
=4230