计算题.1.7/10x3+3/10÷1/3 2.3-3/2x10/21-2/7 3.[1-(3/5-3/10)]÷7/8

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计算题.1.7/10x3+3/10÷1/3 2.3-3/2x10/21-2/7 3.[1-(3/5-3/10)]÷7/8
计算题.1.7/10x3+3/10÷1/3 2.3-3/2x10/21-2/7 3.[1-(3/5-3/10)]÷7/8

计算题.1.7/10x3+3/10÷1/3 2.3-3/2x10/21-2/7 3.[1-(3/5-3/10)]÷7/8
1.21/10+3/10*3=21/10+9/10=30/10=3
2.3-30/42-2/7=3-5/7-2/7=3-1=2
3.[1-3/5+3/10]/(7/8)=(2/5+3/10)/(7/8)=(4/10+3/10)/(7/8)
=7/10*(8/7)=8/10=4/5

9/14÷(1/3 * 6/7-1/14)= 9/14÷(2/14-1/14)= 9/14÷1/14 = 9/14 * 14 = 9
> 1/7 7/8 * 5/7-3/8 = 1/7 +5/8-3 / 8 = 1/7 +1 / 4 = 4/28 +7 / 28 = 11/28 [1/2 +(3/4-3/5)]÷7/10 = [1/2 +(15/20-12/20)]÷7/10 =(1/2 3/20 )÷7/10
= 13/20 * 10月7日
= 13/14

1.原式=21/10+9/10=3
2.原式=3-5/7-2/7=2
3.原式=(1-3/10)÷7/8=7/10*8/7=4/5