7/15+9/16+8/15+7/16
=1+1
=2
enter cho anh nha
7/15+9/16+8/15+7/16
=1+1
=2
enter cho anh nha
7/15 + 9/16 + 8/15 + 7/16
a, 7/15 + 8/15 + 9/16 +7/16=
b, 4/7 * 5/6 + 4/7 * 1/6
tính nhanh
7/15+9/16+8/15+7/16
Tính bằng cách thuận tiện nhất : 7/15 + 9/16 + 8/15 + 7/16
Tính :
2/5 + 11/15 =
7/8 - 7/9 =
11/13 x 26/31 =
16/24 : 4 =
30 : 6/5 =
9/16 : 4 =
1/2 : 1/3 x 8/15 =
10/3...1/3. 10/6...3/8. 17/4...5/6. 1/3...5/9 5/8...7/5 3/4...15/6 10/9...10/11 7/8...7/2 15/9...3/8 15/7...15/8 16/5...16/7 25/11...1
1.Tính
a)15/16 - 7/16 b)7/4 - 3/4 c)9/5 - 3/5 d) 17/49 - 12/ 49
Lưu ý không tính: 15/16 - 7/16 =8/16 2.
Rút gọn rồi tính
a) 2/3 -3/9 b)7/5 - 15/25
TÍNH NHANH
a) 3/16 + 4/15 + 5/16 + 1/15
b) 6/7 x 8/15 x 7/6 x 15/16
c) 19/20 x 13/21 + 9/20 x 8/21
d) (1+ 10/15 ) x (1+ 1/16 ) x ( 1+ 1/17 ) x ( 1+ 1/18 )
MINK ĐANG CẦN GẤP
5/7 : 15/28 =
9/11 :21/22 =
7/9 :5/6 =
8/15: 16/25 =