Bài 1:
a, \(\frac{1}{7}+3+\frac{5}{6}=\frac{1}{7}+\frac{3}{1}+\frac{5}{6}=\frac{6}{42}+\frac{126}{42}+\frac{35}{42}=\frac{167}{42}\)
b, \(\frac{4}{7}+\frac{5}{9}+4=\frac{4}{7}+\frac{5}{9}+\frac{4}{1}=\frac{36}{63}+\frac{35}{63}+\frac{252}{63}=\frac{323}{63}\)
Trả lời:
A . 167/42
B. 692 / 63
Hok tốt!
A, 1/7 + 3 + 5/6 = 167/42
B, 4/7 + 5/9 + 4 = 353/63
a) 1/7 + 3 + 5/6
= 3 + ( 1/7 + 5/6 )
= 3 + 41/42
= 167/42
b)4/7 + 5/9 + 4
= ( 4/7 + 5/9 ) + 4
= 71/63 + 4
= 323/63
#hien#
k cho là j
