\(\frac{3}{7}:\frac{5}{8}=\frac{24}{35}\)
\(\frac{3}{7}:\frac{5}{8}=\frac{3}{7}\times\frac{8}{5}=\frac{24}{35}\)
\(\frac{3}{7}\frac{.}{\cdot}\frac{5}{8}=\frac{24}{35}\)
\(\frac{3}{7}:\frac{5}{8}=\frac{24}{35}\)
\(\frac{3}{7}:\frac{5}{8}=\frac{3}{7}\times\frac{8}{5}=\frac{24}{35}\)
\(\frac{3}{7}\frac{.}{\cdot}\frac{5}{8}=\frac{24}{35}\)
Đúng ghi Đ sai ghi S
a) 3/8+4/8=7/8 b) 4/7+3/5 =7/12
c) 5/8+3/5=49/40 d) 2/3+3/4=17/12
a) 2/5 + 7/10 =
b) 6/7 - 5/8 =
c) 3/5 x 15/8 =
d) 1/4 : 3/7 =
a, 4/5 - 1/3. 5/3-3/2
b,7/6-2/3 5/4-3/8
c, 5/6-5/8. 7/4-5/6
a, 7/15 + 4/5 =
b, 4/5 x 5/8 =
c, 2/3 - 3/8 =
d, 9/7 : 5 =
Bài 1: Tính :
a) 2/5 + 7/10 = ……………………………………………….......................... b) 6/7 - 5/8 = …………………………………………………………………… c) 3/5 x 15/8 =…………………………………………………………............ d) 1/4 : 3/7 =……………………………………………………………..............a) 60 × (7/12 + 4/15) =
b) 5/6 ×( 6/5 - 6/7 ) =
c) 1/2 × 2/3 × 3/4 × 4/5 × 5/6× 6/7 × 7/8 × 8/9 =
A,\(\dfrac{8}{9}:\dfrac{4}{5}+\dfrac{3}{5}\)
B,\(\dfrac{5}{8}\) + \(\dfrac{1}{4}\)
C,\(\dfrac{7}{8}\) x \(\dfrac{4}{7}\) +\(\dfrac{5}{9}\)
D,\(\dfrac{9}{8}:\dfrac{4}{3}-\dfrac{4}{7}\)
a ) 10/3 - 8/3
11/4 - 5/4
32/17 + 21/17
b ) 5/6 + 7/8
3/7 - 5/14
7/4 - 3/5
Help
tính theo mẫu :
Mẫu : ( 5 / 8 x 3 / 4 ) x 4 / 5 = 5 / 8 x ( 3 / 4 x 4 / 5 ) = 5 / 8 x 3 / 5 = 3 / 8
a) ( 4 / 9 x 3 / 7 ) x 7 / 4
b) ( 6 / 5 x 4 / 5 ) x 25 / 16
c) ( 7 / 8 x 16 / 9 ) x 3 / 14
tính theo mẫu :
Mẫu : ( 5 / 8 x 3 / 4 ) x 4 / 5 = 5 / 8 x ( 3 / 4 x 4 / 5 ) = 5 / 8 x 3 / 5 = 3 / 8
a) ( 4 / 9 x 3 / 7 ) x 7 / 4
b) ( 6 / 5 x 4 / 5 ) x 25 / 16
c) ( 7 / 8 x 16 / 9 ) x 3 / 14