66乘39加39乘34的简便运算

2024-12-16 20:20:10
推荐回答(5个)
回答1:

=39x(66十34)
=39x100
=3900

回答2:

66*39+39*34
=39*(66+34)
=39*100
=3900

回答3:

乘法分配律。39x(66+34)

回答4:

66× 39 +39 ×34=39 ×(66+ 34)
=39 ×100=3900

回答5:

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
66×39+39×34
= 39× ( 66+34)
= 39 ×100
= 3900