计算过程方法如下
解:142×38-42 ×8
=100x38+42x38-42x8
=3800+42x(38-8)
=3800+42x30
=3800+1260
=5060
142×38-42 ×8
=100x38+42x38-42x8
=3800+42x(38-8)
=3800+42x30
=3800+1260
=5060
142*38-42*8
=(100+42)*38-42*8
=100*38+42*38-42*8
=3800+42*(38-8)
=3800+42*30
=3800+1260
=5060
数学计算题,
具体求法,
如图所示