Question

急求五年级数学口算（分数）600道·！

分数~！！！！

Answer 1

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

1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =

3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =

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

1/6 + 1/2 -1/6 = 7 .5-(2.5+3.8)= 7/8 + 3/8 =

3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =

1-1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256=?

1-(1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256)=?

1-1/2+(1/4+1/8+1/16+1/32+1/64+1/128+1/256)=?

1-(1/2+1/4+1/8+1/16+1/32+1/64+1/128)+1/256=?

1/64*1/128+11/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256=?

5/7+4/9=

1/4+5/6=

3/4+5/6=

10/7+18/5=

7/10+19/20=

1/5+2/5=

3/7+4/7=

3/8+7/8=

8/9-7/9=

6/9-5/9=

6/9+1/9=

7/9-4/9=

6/9-1/4=

3/6+3/7=

5/8-1/2=

8/9+2/3=

3/7 × 49/9 - 4/3

8/9 × 15/36 + 1/27

12× 5/6 – 2/9 ×3

8× 5/4 + 1/4

6÷ 3/8 – 3/8 ÷6

4/7 × 5/9 + 3/7 × 5/9

5/2 -（ 3/2 + 4/5 ）

7/8 + （ 1/8 + 1/9 ）

9 × 5/6 + 5/6

3/4 × 8/9 - 1/3

7 × 5/49 + 3/14

6 ×（ 1/2 + 2/3 ）

8 × 4/5 + 8 × 11/5

31 × 5/6 – 5/6

9/7 - （ 2/7 – 10/21 ）

5/9 × 18 – 14 × 2/7

4/5 × 25/16 + 2/3 × 3/4

14 × 8/7 – 5/6 × 12/15

17/32 – 3/4 × 9/24

3 × 2/9 + 1/3

5/7 × 3/25 + 3/7

3/14 ×× 2/3 + 1/6

1/5 × 2/3 + 5/6

9/22 + 1/11 ÷ 1/2

5/3 × 11/5 + 4/3

45 × 2/3 + 1/3 × 15

7/19 + 12/19 × 5/6

1/4 + 3/4 ÷ 2/3

8/7 × 21/16 + 1/2

101 × 1/5 – 1/5 × 21