乘法分配律为:两个数的和与一个数相乘,先将它们与这个数分别相乘,再相加,积不变.即:(a+b)×c=a×c+b×c.反过来则:a×c+b×c=(a+b)×c
61+59×61+40×61
= 61× ( 1+59+40)
=61×100
= 6100
61+59*61+40*61
=61*(1+59+40)
=61*100
=6100
望采纳,谢谢!
61+59x61+40x61
=61×(1+59+40)
=61×100
=6100
解:原式=61×(1+59+40)
=61×100
=6100
61+59x61+40x61
=(1+59+40)x61
=100x59
=5900