a: =1+1=2
b: =5/6+3/4
=10/12+9/12
=19/12
a: =1+1=2
b: =5/6+3/4
=10/12+9/12
=19/12
2/5+2/3+3/4
2/6+3/12
5/6+1/3
1/3+5/12+5/6
5/8+4/7
1/5+5/35
5/8+3/4
1/6+1/3+1/12
1/6+5/24+2/3
7/3+8/7
2/5+1/6
1/7+1/4+6/7+3/4
giúp với
và ai giải được gọi cụ
Tính:
a) 1/8 x 4/5 : 6/10
b) (2/3 - 1/4) x 6/5
c) 24/35 : (4/5 x 8/7)
d) 3 + 5/7 - 1/3
Tính:
3/5+7/8
2+3/4
1-3/4
6/8+7
35/9-2
1/3+1/6+4/3+2/3+5/6
5/7+×/35=4/5
×+2/5=1/2
2/3-×=8/21
Tính:
a) 6 - 2/5 + 3/5 x 3
b) ( 31/35 - 4/7 ) x 8/7 : 2
2. Tính: A) 1/3 + 1/5 - 1/4. B) 7/8 - ( 1/4 + 2/5 ). C) 5/11 - ( 3/5 - 6/11 ). D) 5/7 - ( 19/35 - 6/15 ).
2. Tính: A) 1/3 + 1/5 - 1/4. B) 7/8 - ( 1/4 + 2/5 ). C) 5/11 - ( 3/5 - 6/11 ). D) 5/7 - ( 19/35 - 6/15 ).
Tính nhanh:3/15+4/20+5/25-6/30-7/35-8/40
d ) 1 / 2 + 4 / 3 =
e ) 6 / 7 + 11 / 4 =
g ) 9 / 5 + 7 /4 =
h) 2 / 8 +1 / 4=
i) 3 / 20 + 2 / 5 =
k ) 6 / 35 + 2 / 7 =
giúp mình nha