运用乘法的运算定律计算下面8道题:
来源:学生作业帮 编辑:搜狗做题网作业帮 分类:数学作业 时间:2024/06/25 10:06:17
运用乘法的运算定律计算下面8道题:
『72+25』x40
『125-36』x8
『7+4』x25
83x25+7x25
125x『8+4』
59x101-59
293x99+293
『125+16』x8
『72+25』x40
『125-36』x8
『7+4』x25
83x25+7x25
125x『8+4』
59x101-59
293x99+293
『125+16』x8
![运用乘法的运算定律计算下面8道题:](/uploads/image/z/318367-55-7.jpg?t=%E8%BF%90%E7%94%A8%E4%B9%98%E6%B3%95%E7%9A%84%E8%BF%90%E7%AE%97%E5%AE%9A%E5%BE%8B%E8%AE%A1%E7%AE%97%E4%B8%8B%E9%9D%A28%E9%81%93%E9%A2%98%EF%BC%9A)
(1)『72+25』x40
=72 x40+25x40
=2880+1000
=3880
(2)『125-36』x8
=125x8-36x8
=1000-288
=712
(3)『7+4』x25
=7x25+4x25
=175+100
=275
(4)83x25+7x25
=(83+7)x25
=90x25
=2250
(5)125x『8+4』
=125x8+125x4
=1000+500
=1500
(6)59x101-59
=59x101-59x1
=59x(101-1)
=59x100
=5900
(7)293x99+293
=293x99+293x1
=293x(99+1)
=293x100
=29300
(8)『125+16』x8
=125x8+16x8
=1000+128
=1128
=72 x40+25x40
=2880+1000
=3880
(2)『125-36』x8
=125x8-36x8
=1000-288
=712
(3)『7+4』x25
=7x25+4x25
=175+100
=275
(4)83x25+7x25
=(83+7)x25
=90x25
=2250
(5)125x『8+4』
=125x8+125x4
=1000+500
=1500
(6)59x101-59
=59x101-59x1
=59x(101-1)
=59x100
=5900
(7)293x99+293
=293x99+293x1
=293x(99+1)
=293x100
=29300
(8)『125+16』x8
=125x8+16x8
=1000+128
=1128