658十997怎么简便就怎么算
658十997怎么简便就怎么算
658十997
=658+(1000-3)
=658+1000-3
=1655
21.6÷(1.8十3.6)用简便就怎么算
怎么简便就怎么算
21.6÷(1.8十3.6)
=21.6÷5.4
=4
672-36十64怎么简便就怎么计算
672-36+64
=672+(64-36)
=672+28
=700
299Ⅹ19十(l9十299)怎样算简便就怎么算
299Ⅹ19十(l9十299)
=(299+1)×19+299
=300×19+299
=5700+299
=5999
怎样简便就怎么算
解:
3.2-3.2*(3-2.5)
=3.2-3.2*0.5
=3.2x(1-0.5)
=3.2x0.5
=1.6
8.5*99
=8.5x(100-1)
=8.5x100-8.5x1
=850-8.5
=841.5
四分之三*五分之二/四分之三*五分之二
=3/4 x 2/5 / 3/4x2/5
=3/4/ 3/4x2/5x 2/5
=1x2/5x 2/5
=4/25
怎么简便就怎么计算
全化成小数试一下
16×401怎么简便就怎么算
=16x(400+1)
=16×400+16
=6416
2.05×4.2怎么简便就怎么算
2.05x4.2
=2x4.2+0.05x4.2
=8.4+0.21
=8.61
140057怎么简便就怎么计算
140057怎么简便就怎么计算
1400÷5÷7
=1400÷(5*7)
=1400÷35
=40
101×35×2 怎么简便就怎么算
101*35*2
=101*7*5*2
=707*10
=7070