急求五年级数学口算（分数）600道·!分数~!
急求五年级数学口算（分数）600道·!分数~!
急求五年级数学口算（分数）600道·!
分数~!
急求五年级数学口算（分数）600道·!分数~!
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