六年级数学题(3道计算题）1.能简算的要简算7/10*3/7-5/6+7/10（14/9*29+58/9*29）*5/42.解方程5.6除以70%乘以X=5%就这些,

六年级数学题(3道计算题）1.能简算的要简算7/10*3/7-5/6+7/10（14/9*29+58/9*29）*5/42.解方程5.6除以70%乘以X=5%就这些,
六年级数学题(3道计算题）
1.能简算的要简算
7/10*3/7-5/6+7/10
（14/9*29+58/9*29）*5/4
2.解方程
5.6除以70%乘以X=5%
就这些,

六年级数学题(3道计算题）1.能简算的要简算7/10*3/7-5/6+7/10（14/9*29+58/9*29）*5/42.解方程5.6除以70%乘以X=5%就这些,
7/10*3/7-5/6+7/10
=3/10-5/6+7/10
=3/10+7/10-5/6
=1-5/6
=1/6
2.5.6/0.7x=1/20
8/x=1/20
x=20*8=160
或者：5.6x/0.7=1/20
8x=1/20
x=1/160
（因你没有说清x在分子还是在分母上,故有两种答案.）

7/10*3/7-5/6+7/10
=3/10-5/6+7/10
=3/10+7/10-5/6
=1-5/6
=1/6

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7/10*3/7-5/6+7/10
=3/10-5/6+7/10
=3/10+7/10-5/6
=1-5/6
=1/6
(14/9*29+58/9*29)*5/4
=29(14/9+58/9)*5/4
=29*8*5/4
=290
5.6/70%X=5%
8X=5%
X=0.625%

第一题：=（3/7+1）*7/10-5/6
=10/7*7/10-5/6
=1-5/6
=1/6
二 ：=

1/6

1.原式=7/10(1+3/7)-5/6
=7/10×10/7-5/6
=1-5/6
=1/6
6/0.7×x=0.05
解得x=7/1200

7/10*3/7-5/6+7/10
=3/10-5/6+7/10
=3/10+7/10-5/6
=1-5/6
=1/6
(14/9*29+58/9*29)*5/4
=29(14/9+58/9)*5/4
=29*8*5/4
=29*5*8/4
=29*5*2
=290
5.6/70%X=5%
5.6/0.7x=5%
8X=5%
X=0.625%