用乘法分配律，并且用简便计算
23x77十23x23
78x99＋78
（125＋7）x8
25x104
34x98
59x101
第1个回答 2015-11-30
23x77+23x23
=23x(77+23)
=23x100
=2300
78x99+78
=78x(99+1)
=78x100
=7800
(125+7)x8
=125x8+8x7
=1000+58
=1056
25x104
=25x(100+4)
=25x100+4x25
=2500+100
=2600
34x98
=34x(100-2)
=34x100-34x2
=3400-68
=3332
59x101
=59x(100+1)
=59x100+59x1
=5900+59
=5959本回答被网友采纳
=23x(77+23)
=23x100
=2300
78x99+78
=78x(99+1)
=78x100
=7800
(125+7)x8
=125x8+8x7
=1000+58
=1056
25x104
=25x(100+4)
=25x100+4x25
=2500+100
=2600
34x98
=34x(100-2)
=34x100-34x2
=3400-68
=3332
59x101
=59x(100+1)
=59x100+59x1
=5900+59
=5959本回答被网友采纳
