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
49×101
= 49× ( 100+1)
= 49×100+49
= 4900+49
= 4949
解:49x101=49x(100+1)
=49x100+49x1
=4900+49
=4949
49×101
=49×(100+1)
=49×100+49
=4900+49
=4949
49x101
=49x(100+1)
=4900+49
=4949
49×101
=49×(100+1)
=49×100+49×1
=4900+49
=4949