計算下面各題。能簡算的要簡算

2021-03-19 18:20:16 字數 3145 閱讀 8152

1樓:樂為人師

15×(2/3+3/5)

= 15×2/3+15×3/5

=10+9

=19〖5/6-(1/8+5/12)〗×3/7=[5/6-13/24]×3/7

=7/24×3/7

=1/8

計算下面各題,能簡便計算的要簡便計算。 3/5+3/4-5/6 8/9+2/7+5/7 15/8-3/4-1/4 = = = = = =

2樓:吃葷的兔子

3/5+3/4-5/6 8/9+2/7+5/7 15/8-3/4-1/4

=36/60+45/60-50/60 =8/9+1 =15/8-1

=31/60 =17/9 =7/8

9/7-1/6+3/7 7/4-12/23-3/4 5-6(3/8+1/6)

= 12/7-1/6 = 1-12/23 =5-(9/4+1)

= 72/42-7/42 =11/23 =7/4

=65/42

計算下面各題,能簡算的要簡算.①[3.2×(1- 5 8 )+3 3 5 ]×2 1 12

3樓:今生窒諳

①[3.2×(1-5 8

)+33 5

]×21

12=[3.2×3 8

+33 5

]×21

12=[1.2+33 5

]×21

12=4.8×21

12=10;

②13 7

+2415

+44 7

+3215

=(13 7

+44 7

)+(24

15+32

15)=6+52 5

=112 5

;③43

97×99

=43 97

×(97+2)

=43 97

×97+43

97×2

=43+86

97=4386

97;④1.8×1 4

+2.2×25%

=1.8×0.25+2.2×0.25

=(1.8+2.2)×0.25

=4×0.25=1.

計算下面各題,能簡算的要簡算。3/5÷6÷1/15速度!!

4樓:匿名使用者

3/5÷6÷1/15  

=3/5÷1/15÷6  

=3/5x15÷6

=9÷6

=1.5

50×(3/10+1/5) 

=50×(3/10+2/10) 

=50×1/2

=25

3/8×4/7÷3/8×4/7    

=3/8÷3/8×4/7×4/7

=1×4/7×4/7

=16/49

2/7÷8+5/7×1/8     

=2/7×1/8 +5/7×1/8     

=(2/7+5/7)×1/8     

=1×1/8    

=1/8    

15÷9/25×4/5      

=15×4/5÷9/25

=12x25/9

=100/3   

﹙13-3/10﹚÷3/5

=﹙130-3)/10x5/3

=127/10x5/3

=127/6

計算下面各題。(能簡算的要簡算) 1/3×5×2/5÷1/3 1/3×1/15+1

5樓:最美晴天小奕

你敢,很高興為您解答:

1、解:

原式=5×2/5×1/3÷1/3

=5×2/5×1/3×3

=2×1

=22、解:

原式=1/3×(1/15+1/5)

=1/3×4/15

=4/45

3、解:

原式=3.7×6/5+1.3×6/5

=(3.7+1.3)×6/5

=5×6/5

=64、解:

原式=3/4-(6/7-1/4)×17/9=(3/4+1/4-7/16)×17/9

=9/16×17/9

17/16

計算下面各題能簡算的要簡算6/5-2/1+3/1

6樓:匿名使用者

6/5-2/1+3/1

5/6-1/2+1/3

=(5-3+2)/6

=4/6

=2/3

=3分之2

7樓:華山論劍

5/6-1/2+1/3=5/6-(3/6-2/6)=5/6-1/6=4/6=2/3

計算下面各題,能簡算的要簡算

31.9 18 8 31.9,31.9 18 8 31.9 10,319 21 13 2 5 911,21 11 15 911,21 15 11 119,35 2 3 215 45,23 45 2 15 45,30 6,36 1 1 100 70 27,1 7 10 27,310 72 2120 1...

計算下面各題,能簡算的要簡算

1 7 125 8 7 125 8 7 1000 7000 2 120 20 2 45 120 40 45 80 45 125 3 35 32 128 32 35 32 4 35 36 1260 4 43 36 36 57 43 57 36 100 36 3600 5 640 4 16 8 640 ...

計算下面各題,能簡算的要簡算,並寫出主要的簡算過程(1)9 06 2 68 0 32(2)(3 06 0 25 2 76)

1 9.06 2.68 0.32,9.06 2.68 0.32 9.06 3,6.06 2 3.06 0.25 2.76 0.2,12.24 2.76 0.2,15 0.2,3 3 18 3 5 4 25 18 0.6 4 52 18 0.6 10 18 10.6,7.4 4 2.7 1.25 5....