怎樣簡便怎樣算。5又37584又

2021-03-03 20:27:44 字數 2965 閱讀 3621

1樓:匿名使用者

5又3/7-(5/8+4又3/7)

=5又3/7-5/8-4又3/7

=(5又3/7-4又3/7)-5/8

=1-5/8

=3/8

7/8-1/5-4/5

=7/8-(1/5+4/5)

=7/8-1

=-1/8

簡便計算1 4/9+3/8+5/9 21-3/10-2/10 34/7+11/15+4/15

2樓:匿名使用者

簡便計算

1 4/9+3/8+5/9

=4/9+5/9+3/8

=1+3/8

=1又3/8

21-3/10-2/10

=1-(3/10+2/10)

=1-5/10

=1-1/2

=1/2

34/7+11/15+4/15

=4/7+(11/15+4/15)

=4/7+1

=1又4/7

3樓:home杭好地方

2又1/5-4/7-3/7 =2又1/5-(4/7+3/7) =2又1/5-1 =1又1/5 1又5/6-2/9-7/9 =1又5/6-(2/9+7/9) =1又5/6-1 =5/6 2又4/9-3/11-4/9 =2又4/9-4/9-3/11 =2-3/11 =1又8/11

4樓:dwy雨過天晴

計算機算很容易的再多資料再多量資料也很容易算出來的excel軟體

1.怎麼簡便怎麼計算。 7/8-(1/6+3/8) 5-5/11-6/11 3/4-2/9+1/4

5樓:樂為人師

7/8-(1/6+3/8)

=7/8-1/6-3/8

=7/8-3/8-1/6

=1/2-1/6

=1/3

5-5/11-6/11

=5-(5/11+6/11)

=5-1

=43/4-2/9+1/4

=3/4+1/4-2/9

=1-2/9

=7/9

15又3/8-5又3/4+4.75

=15又3/8-5又3/4+4又3/4

=15又3/8-(5又3/4-4又3/4)=15又3/8-1

=14又3/8

5/8+1/8-0.2

=3/4-0.2

=0.55

7/12-1/4+4/5

=1/3+4/5

=17/15

=1又2/15

7/4+7/8-3/7+1/8 5/8+3/10-1/8+7/10 簡便計算還有怎樣變符號。。

6樓:妙酒

7/4+7/8-3/7+1/8

=(4/7-3/7)+(7/8+1/8)

=1/7+1

=8/7

5/8+3/10-1/8+7/10

=(5/8-1/8)+(3/10+7/10)=1/2+1

=1.5

三、怎麼算簡便就怎樣算。 1/4+3/7+4/7+3/4 2. 8/9-1/4+1/2 3. 3/8+5/6+5/8 4. 2-1/8-7/8 5. 1+3/4-7/12

7樓:匿名使用者

1/4+3/7+4/7+3/4

=1/4+3/4+3/7+4/7

=(1/4+3/4)+(3/7+4/7)

=1+1==2

2. 8/9-1/4+1/2

=8/9+(1/2-1/4)

=8/9+1/4

=32/36+9/36

=41/36

3. 3/8+5/6+5/8

=(3/8+5/8)+5/6

=1+5/6

=11/6

4. 2-1/8-7/8

=2-(1/8+7/8)

=2-1

=15. 1+3/4-7/12

=1+9/12-7/12

=1+1/6

=7/6

6. 5/8+1/4-3/4

=5/8-1/2

=5/8-4/8

=1/8

簡便運算 1 7/25×101-7/25 2(5/6+7/8-5/12)÷1/2 3 75%×3/7+1/7×3/4+3/7×0.75 = = =

8樓:妖精

1 7/25×101-7/25

=7/25×(101-1)

=7/25×100

=282(5/6+7/8-5/12)÷1/2=(5/6+7/8-5/12)×2

=5/6×2+7/8×2-5/12×2

=5/3-5/6+7/4

=5/6+7/4

=10/12+21/12

=31/12

3 75%×3/7+1/7×3/4+3/7×0.75=0.75×(3/7+1/7+3/7)

=0.75×1

=0.75

不懂可追問,有幫助請採納,謝謝!

9樓:燕北風情

1 7/25×

101-7/25=7/25×(100+1)-7/25=28+7/25-7/25

=282(5/6+7/8-5/12)÷1/2=(5/6+7/8-5/12)x2

=5/3+7/4-5/6

=5/6+7/4

=10/12+21/12

=31/12

3 75%×3/7+1/7×3/4+3/7×0.75=3/4x3/7+1/7x3/4+3/7x3/4

=3/4x(3/7+1/7+3/7)

=3/4x1

=3/4

願你學習進步

10樓:匿名使用者

都是結合律和分配率的應用吧

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