Bài 3: Tính: a) 6/5 + 9/5 b) 12/27 + 7/27 + 8/27 c) 3/15 + 2/5 d) 4/6 + 8/27 c) 5/7 + 8/3 d) 4/9 + 2/3 12/10/2021 Bởi aikhanh Bài 3: Tính: a) 6/5 + 9/5 b) 12/27 + 7/27 + 8/27 c) 3/15 + 2/5 d) 4/6 + 8/27 c) 5/7 + 8/3 d) 4/9 + 2/3
Đáp án: a) 6/5 + 9/5 =6+9/5 =15/5 =3 b) 12/27 + 7/27 + 8/27 =12+7+8/27 =27/27 =1 c) 3/15 + 2/5 =3/15+6/15 =3+6/15 =9/15 =3/5 d) 4/6 + 8/27 =36/54+16/54 =52/54 =26/27 c) 5/7 + 8/3 =15/21+56/21 =71/21 d) 4/9 + 2/3 =4/9+6/9 =10/9 chúc bạn học tốt! Bình luận
a)15/10
b)27/81
c) 5/20
d)12/33
e)13/10
g)6/12
xin ctlhn
Đáp án:
a) 6/5 + 9/5
=6+9/5
=15/5
=3
b) 12/27 + 7/27 + 8/27
=12+7+8/27
=27/27
=1
c) 3/15 + 2/5
=3/15+6/15
=3+6/15
=9/15
=3/5
d) 4/6 + 8/27
=36/54+16/54
=52/54
=26/27
c) 5/7 + 8/3
=15/21+56/21
=71/21
d) 4/9 + 2/3
=4/9+6/9
=10/9
chúc bạn học tốt!