\(\dfrac{5}{2}\times\dfrac{1}{3}+\dfrac{1}{4}=\dfrac{5}{6}+\dfrac{1}{4}=\dfrac{10}{12}+\dfrac{3}{12}=\dfrac{13}{12}\)
`5/2 xx 1/3+ 1/4 = 5/6 + 1/4 = 20/24 + 6/24 = 26/24 = 13/12`
Bài 2:
a) ( 1/4 :5 x 1/3 x 1/4 ) : ( 2/3 + 1/5 :4 )
b) ( 3/4 :5 + 1/2:3/5 ) x ( 4/5 + 1/3 x2 )
1) 1/3 x 1/2 x 3/7 2) 5/4 x 1/3 + 1/7 3) 8 x ( 8/9-2/3 ) 4) 5/6 x 48/20 x 1/2 5) ( 2/5 + 3/4 ) x 8 6) 10 x ( 1/2-1/5 )
Bài 299: Tính
1) 1/3 x 1/2 x 3/7
2) 5/4 x 1/3 + 1/7
3) 8 x ( 8/9-2/3 )
4) 5/6 x 48/20 x 1/2
5) ( 2/5 + 3/4 + x 8
6) 10 x ( 1/2 - 1/5 )
Trình bày rõ cách làm giúp ạ!!
35 nhan x + 1/2 : 5/3 - 5/4 = 1/2 x 1/3
3/5 nhan x + 1/2 : 5/3 - 5/4 = 1/2 x 1/3
Bài 1 : tính giá trị của biểu thức
1/2 x 3/4 : 4/5
2/3 + 1/6 - 1/2
3/5 + 4 : 2/3 - 3/2
2 tìm x
x - 1/4 = 1/2
2/3 + x = 1
2/9 nhân x 6/15 : 4/5
3/5 :x = 1/7
Bài 299: Tính
1) 1/3 x 1/2 x 3/7
2) 5/4 x 1/3 + 1/7
3) 8 x ( 8/9-2/3 )
4) 5/6 x 48/20 x 1/2
5) ( 2/5 + 3/4 ) x 8
6) 10 x ( 1/2-1/5 )
Trình bày rõ cách làm giúp nhen!!
tính nhanh
4/5-2/3/+1/5-1/3
2/5 x 7/4 - 2/5x3/7
13/4 x 2/3 x 4/13 x 3/12
75/100 + 18/21 + 19/32 +1/4 + 3/21 + 13/32
2/5 + 6/9+3/4+3/5+1/3+1/4
Tính bằng 2 cách:
(2/3 x 4/5) x 5/6
(1/2 + 1/3) x 1/5
(2/3 x 4/5) x 5/6
(1x2 + 1/3) x 1/5
4 tìm x
2/3 + x + 1
2/9 nhân x = 6/15:4/5
3/5 : x = 1/7
x - 1/4 = 1/2
2 tinh giá trị biểu thức
1/2 nhân 3/4 : 4/5
2/3 + 1/6 -1/2
3/5 +4 : 2/3 - 3/2
