1樓:淺笑_季末
8×1/4+15÷4-21×0.25
=8/4+15/4-21/4
=23/4-21/4
=2/4
=1/2
36÷(5/12-1/4)×1又1/9
=36÷2/12×10/9
=36×10/9×12/2
=40×12/2
=240
11-3又7/11-(1又4/11×8/15+1又4/11×7/15)
=11-40/11-(15/11×8/15+15/11×7/15)=11-40/11-15/11×(8/15+7/15)=11-40/11-15/11×1
=11-(40/11+15/11)
=11-5=6
2樓:為愛守護你的我
8×1/4+15÷4-21×0.25
=2+3又3/4-5.25
=2+3.75-5.25
=0.5
36÷(5/12-1/4)×1又1/9
=36÷1/6x10/9
=216x10/9
=240
11-3又7/11-(1又4/11×8/15+1又4/11×7/15)
=7又4/11-15/11
=6又15/11-15/11=6=
脫式計算,求解,能簡便就簡便
3樓:匿名使用者
5/17×9/24+9/17×7/24
=5/17×9/24+7/17×9/24
=(5/17+7/17)×9/24
=12/17×9/24
=9/34
用脫式計算,能簡便就簡便。 20
4樓:新野旁觀者
11.4+1.25×2.4
=11.4+1.25×2+1.25×0.4=11.4+2.5+0.5
=11.4+3
=14.4
2.3+3.91÷(回22-19.7)
=2.3+3.91÷2.3
=2.3+1.7
=4(455-12.5×4)÷8.1
(455-50)÷8.1
=405÷9÷0.9
=45÷0.9
=500.8×[13-(3.12+5.28)]=0.8×(答13-8.4)
=0.8×4.6
=0.8×(5-0.4)
=0.8×5-0.8×0.4
=4-0.32
=3.68
脫式計算(能簡便就簡便計算)(用漢字和數字回答)
5樓:尹浩然
(1又7分之5×0.875+2.6÷5分之4)÷2又3分之8=(1又七分之五x八分之七+二又五分之三÷五分之四)÷二又八分之三=(二分之三+四分之十三)÷二又八分之二
=2(69分之2+71分之2)×23+25÷71=49.5×十又五分之三-49.5×五分之三=49.5
6樓:玉歌飛
後面好模糊 看不清楚
脫式計算,能簡便的就簡便,快,快,謝謝,求求大家
7樓:兗礦興隆礦
7/20*(1-5/28÷10/7)
=7/20-5/28*7/20*7/10
=7/20-7/(4*40)
=49/160
(2-1/4*1/6)÷1/6
=47/24*6
=47/4
5/9*(5-13/10÷13/20)
=5/9*3
=5/3
(1/3-1/5)÷7/15
=2/15*15/7
=2/7
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