4/15 +1/2=23/30
51/9 - 2/3=5
3/4 x 15/26=45/104
7/3 : 5/14=98/15
4/15 + 1/2
= 8/30 + 15/30
= 23/30
51/9 - 2/3
= 51/9 - 6/9
= 45/9
= 5
3/4 × 15/26
= 45/104
7/3 : 5/14
= 7/3 × 14/5
= 98/15
4/15 1/2
51/9 - 2/3
3/4 x 15/26
7/3 : 5/14
Bài 1 : Tính
a) 3/7 + 9/8 = ?
b) 4/5 - 2/15 = ?
c) 8/11 x 33/5 = ?
d) 4: 1/7 = ?
Bài 1: Tìm x
a, x + 15/16 + 7/8 = 15/4 b, x - 27/28 - 9/14 = 13/7
c, x nhân 1/5 + x + 1/6 = 2/3 d, x: 14 = 1/4 + 2/9 + 3/4
tính bằng cách thuận tiên nhất :
a/213 + 367 - 267 - 33 =
b/15 - 14 + 13 - 12 + 11 - 10 + 9 - 8 =
bài 1:Tìm x biết
a,X x 3/4 = 9/14 b,x : 5/9 = 3/10
bài 2:Tính
a, 3/10 + 2/5 : 4/15 b, 4/7 x 3 + 2/3 x 2
Giúp mình với nhé
tính : a) 2/3 *( 2/18+6/12-3/33 ) b) 6/14+4/25-5/10*3/16 c)5/25*(9/18+16/32-12/46) + 9/17 d)11/32:(14/18-16/27) + (2/3-5/15) e) ( 1/9+2/17)+3/6-(12/17-1/2) +5/9
4/ 5 x 15/11 x 2/9
4/7 x 2/5 + 4/7 x 3/5
(5/7 + 7/8) x 2
2/14 + 3/7 - 3/14 x 2
5/4 - 4/5 * 4/3
3/7 : 1/2 * 14/15
2/5 + x = 6/7
1/3 : x = 8/9
làm chi tiết giúp mình nhé !
bài 1
4/7+4
3+6/11
3-5/7
21/9-2
15/24+2
63/45-20/25
3/4-2/8
6/7-5/8
37/45-5/9
46/39-11/13
5/12+3/4+1/3
1/2+3/7+11/14
7/10-(1/5+1/4)
15/4-2/3-3/4
