Question

作业,几道数学题,小学六年级的啦

脱式计算(能简算的要简算)

(1)5又7/12+3/8-7/12+5/8 例如3/8读作8分之3(怕你们不懂 呵呵)

(2)4又1/12-3又3/4*0.6除以3/4 *这个是称号 除号不懂打 ^_^

(3)0.4*1.09除以1/25

(4)(5.7*2又2/19-4又5/9)除以2/9

就这么几题,记得可以简便的要简便算哦,我明天要交了,所以最好能在今晚上答出来,答的好的加分奖励 ~

Answer 1

(1)5又7/12+3/8-7/12+5/8
=(5又7/12-7/12)+(3/8+5/8)
=5+1
=6

(2)4又1/12-3又3/4*0.6除以3/4
=4又1/12-3又3/4*3/5*4/3
=4又1/12-3又3/4*4/5
=49/12-3
=49/12-36/12
=13/12

(3)0.4*1.09除以1/25
=2/5*109/100*25
=2/5*109/4
=109/10
=10.9

(4)(5.7*2又2/19-4又5/9)除以2/9
=(5又7/10*40/19-41/9)*9/2
=(57/10*40/19-41/9)*9/2
=(3*4-41/9)*9/2
=(12-41/9)*9/2
=12*9/2-41/9*9/2
=54-41/2
=108/2-41/2
=67/2
=33.5

Answer 2

(1)5又7/12+3/8-7/12+5/8=（5又7/12-7/12）+（3/8+5/8）=5+1=6

（2）4又1/12-3又3/4*0.6除以3/4=4又1/12-3又3/4*4/3*3/5=3又红1/12

（3）0.4*1.09除以1/25 =0.4*25*1.09=10.9

(4)(5.7*2又2/19-4又5/9)除以2/9=（12-4又5/9）*9/2
=33又1/2

简便运算关键在于平时多做题。

Answer 3

5又7/12+3又3/8-7/12+5/8
=（5又7/12-7/12）+（3又3/8+5/8）
=4+4
=8

4又1/12-3又3/4×0.6÷3/4
=4又1/12-15/4×3/5×4/3
=4又1/12-3
=1又1/12

0.4×1.09÷1/25
=2/5×1.09×25
=10×1.09
=10.9

(5.7×2又2/19-4又5/9) ÷2/9
=(5又7/10×40/19-41/9)×9/2
=(5又7/10×40/19-41/9) ×9/2
=(12-41/9) ×9/2
=12×9/2-41/9×9/2
=54-20又1/2=33又1/2

多加点分，我打得累死了 ！

Answer 4

(1)5又7/12+3/8-7/12+5/8 例如3/8读作8分之3
=(5又7/12-7/12)+(3/8+5/8)
=5+1
=6

(2)4又1/12-3又3/4*0.6除以3/4
=4又1/12-15/4*3/5*4/3
=4又1/12-3
=1又1/12

(3)0.4*1.09除以1/25
=0.4*1.09*25
=(0.4*25)*1.09
=10*1.09
=10.9

(4)(5.7*2又2/19-4又5/9)除以2/9
=(57/10*40/19-4又5/9)除以2/9
=(12-4又5/9)*9/2
=7又4/9*9/2
=67/9*9/2
=67/2
=33又1/2

Answer 5

(1)(5又7/12-7/12)+(3/8+5/8)=5+1=6
(2)4又1/12-3又3/4*4/5*4/3=4又1/12-4=1/12
(3)2/5*19/10*15/1=19
(4)(57/10*40/19-41/9)*9/2=(12-41/4)*9/2=432/8-369/8=7又7/8