cách 1:4/7 x5/6+4/7x8/9
=4/7x[5/6+8/9]
=4/7x31/18
=62/63
cách 2:4/7x5/6+4/7x8/9
=10/21+32/63
=62/63
- Cách 1: 4/7 x 5/6 + 4/7 x 8/9
- Cách 2: 4/7 x ( 5/6 + 8/9 )
. k nhé :vv
4/7 x 5/6 + 4/7 x 8/9
= 10/21 + 32/63
= 62/63
4/7 x 5/6 + 4/7 x 8/9
= 4/7 x (5/6 + 8/9)
= 62/63
CÁCH 1:
\(\frac{4}{7}\times\frac{5}{6}+\frac{4}{7}\times\frac{8}{9}\)
\(=\frac{10}{21}+\frac{32}{63}\)
\(=\frac{30}{63}+\frac{32}{63}\)
\(=\frac{62}{63}\)
CÁCH 2:
\(\frac{4}{7}\times\frac{5}{6}+\frac{4}{7}\times\frac{8}{9}\)
\(=\frac{4}{7}\times\left(\frac{5}{6}+\frac{8}{9}\right)\)
\(=\frac{4}{7}\times\frac{31}{18}\)
\(=\frac{62}{63}\)
C1 : 4/7 nhân 5/6 = 10/21 + 4/7 nhân 8/9 = 16/21 =26/21
C2 :4/7 nhân (5/6 +8/9 ) =4/7 nhân 31/18 = 62/63
