(30+2)*15+(100-4)*45
=30*15+2*15+100*45-4*45
=450+30+4500-180
=4800
32*15+96*45
=32*15+32*135
=32x(15+135)
=32x150
=4800
2÷52÷14=2/52*1/14=1/26*1/14=1/364
或者:2/14/52=1/7/52=1/364
101X98
=100X98+1X98
=9800+98
=9898
475 +175÷5怎样
=475+35
=510
32×15+96×45用简便方法计算
32×15+96×45
=32*15+32*3*45
=32*(15+135)
=32*150
=6400
=111*8*8+111*36
=111*64+111*36
=111*(64+36)
=111*100
=11100
你好!
1000÷25
=1000×4÷(25×4)
=4000÷100
=40
如果对你有帮助望点右上角的采纳按钮
(15十45)x39
=60x39
=2340
45×11×20
=(45×20)×11
=900×11
=9900