1樓:手機使用者
(bai1)10.1×87
=(10+0.1)du×zhi87
=10×dao87+0.1×版87
=870+8.7
=878.7;
權(2)2.3+2.99÷(22-19.7)=2.3+2.99÷2.3
=2.3+1.3
=4.6;
(3)2.65×1.7+1.35×1.7
=(2.65+1.35)×1.7
=4×1.7
=6.8;
(4)6.3+0.84+3.7+8.16
=(6.3+3.7)+(8.16+0.84)=10+9
=19;
(5)18-(1.4+1.25×2.4)
=18-(1.4+1.25×8×0.3)
=18-(1.4+10×0.3)
=18-(1.4+3)
=18-4.4
=136;
(6)1.25×7.2
=1.25×8×0.9
=10×0.9=9.
脫式計算題(能簡便的要用簡便方法計算)
2樓:匿名使用者
2.5×
0.32×125
=(2.5×0.4)×(0.8×125)
=1×100
=100
907×99+907
=907×(99+1)
=907×100
=90700
(1/3+1/4+1/5)×60
=(1/3)×60+(1/4)×60+(1/5)×60=20+15+12
=47[(1/7)-(1/9)]×63-(2/3)=(1/7)×63-(1/9)×63-(2/3)=9-7-(2/3)
=1又1/3
(3/5)×[(2/8)×2-(1/3)]=(3/5)×[(1/2)-(1/3)]
=(3/5)×(1/6)
=1/10
÷(4/5)
=×(5/4)
=(4/15)×(5/4)
=1/3
12.5×4×0.25×8
=(12.5×8)×(4×0.25)
=100×1
=100
(6/7)×125×7×8
=[(6/7)×7]×(125×8)
=6×1000
=6000
24×[(5/8)+(5/6)]-35
= 24×(5/8)+24×(5/6)-35=15+20-35
=35-35
=0(分數我用括號括起來了,寫的時候記得去掉,5/8讀作八分之五,應該看得懂吧!)
有疑問,請追問
3樓:匿名使用者
3. 09x3. 9÷26
=12. 051÷26
=0. 4635
4樓:匿名使用者
10^5x0.001=100 907x100=90700 20+15+12=47
下面的實在看不清
5樓:匿名使用者
1、(2.5*0.4)*(8*125)=1*1000=10002、907x99+907=907*(99+1)=907003、1/3*60+1/4*60+1/5*60=20+15+12=474、1/7*63-1/9*63-2/3=9-7-2/3=4/35、沒看出來怎麼簡便,只有按順序來=3/5*(1/2-1/3)=1/10
6、還是沒看出來怎麼簡便,只有按順序來=1-(1/5+1/3)/(4/5)=1-2/3=1/3
7、(12.5*8)*(4*0.25)=100*1=1008、【(6/7)*7】*(125*8)=6*1000=10009、【24*(1/8+1/6)】*5-35=(3+4)*5-35=0
脫式計算.(能用簡便方法的就用簡便方法計算)[8.5-(3.6+3.6)]÷2.6 10.1×8...
6樓:清風
(1)[8.5-(3.6+3.6)]÷
du2.6
=[8.5-7.2]÷2.6
=1.3÷2.6
=0.5;
(2)10.1×
zhi87
=(10+0.1)×87
=10×87+0.1×87
=870+8.7
=878.7;
(3)1.4×[(7.5+38.4)÷dao0.9]=1.4×[45.9÷0.9]
=1.4×51
=71.4.
脫式計算.(能用簡便方法計算的要用簡便方法計算) (1)13.6×3-40.6÷2 (2)99×0.75+14×99 (3
7樓:博
(1)13.6×
3-40.6÷2,
copy
=40.8-20.3,
=20.5;bai
(du2)99×zhi0.75+1
4×99,dao
=99×(0.75+0.25),
=99×1,
=99;
(3)(56?5
8)×24,=56
×24-5
8×24,
=20-15,
=5;(4)121×1001
121,
=121×(100+1
121),
=121×100+121×1
121,
=12100+1,
=12101;
(5)15÷3?7×(17+1
21),
=15÷3-7×421,
=5-113,
=323
;(6)246
23÷6?123,
=4123
-123
,=4.
脫式計算.(能用簡便方法計算的要用簡便方法計算) (1)13.6×3-40.6÷2 (2
8樓:風子
(bai1)13.6×
du3-40.6÷2,
zhi=40.8-20.3,
=20.5;dao
(2)99×0.75+1 4
×99 ,
=99×(0.75+0.25),
=99×1,
=99;
(3)(5 6
-5 8
)×24 ,
=5 6
×24-5 8
×24,
=20-15,
=5;(4)121×1001
121,
=121×(100+1
121),
=121×100+121×1
121,
=12100+1,
=12101;
(5)15÷3-7×(1 7
+1 21
) ,=15÷3-7×4
21,=5-11 3
,=32 3
;(6)246
23÷6-1
23,=41
23-1
23,=4.
脫式計算能用簡便方法計算用簡便方法計算
1 70.08 1.25 1.75,zhi 70.08 1.25 1.75 dao 70.08 3,67.08 2 4.6 2.89 5.4 3.11,4.6 5.4 2.89 3.11 10 6,16 3 22 版101,22 100 22 1,2200 22,2222 4 45 36 54 36...
脫式計算能用簡便計算的要簡算
1 3 10 4.25 3.7 134 3 10 3.7 4.25 13 4 3 10 3.7 4.25 134 4 6 10 2 0.125 3.2 25 0.125 8 0.4 25 0.125 8 版 權0.4 25 1 10 10 3 1 7 44 54 17 1 7 44 54 17 98...
脫式計算怎樣簡便怎樣算，脫式計算。 怎樣簡便怎樣算。 3 76 0 25
如圖，第一題可以直接算 32 4分之1 17 12分之5 8 17 5分之12 25 5分之12 5 12 60 1 8分之7 8分之3 4分之1 7 8 3 8 1 4 7 8 1 8 1 4 1 4 1 0 1 2 10分之3 15分之14 5分之4 9 30 28 30 24 30 9 28 ...