127x43-27x43的简便运算方法?

2025-04-06 07:23:10
推荐回答(4个)
回答1:

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
127×43-27×43
= 43× ( 127-27)
= 43×100
= 4300

回答2:

127x43-27x43
=(127-27)x43
=100x43
=4300

回答3:

127x43-27x43
=43x(127-27)
=43x100
=4300

回答4:

=(127-27)×43
=100×43
=4300