Bài 2:Tính
a)7/15 +4/5 -1/3 .
b)2/3 -1/8 :1/3.
c)4/5 ×5/8 – 1/4.
d)1/2:(29/35 – 3/7 ).
Bài 2:Tính a)7/15 +4/5 -1/3 . b)2/3 -1/8 :1/3. c)4/5 ×5/8 – 1/4. d)1/2:(29/35 – 3/7 ).
By Eva
By Eva
Bài 2:Tính
a)7/15 +4/5 -1/3 .
b)2/3 -1/8 :1/3.
c)4/5 ×5/8 – 1/4.
d)1/2:(29/35 – 3/7 ).
Đáp án:
Mk làm lại ak
Giải thích các bước giải:
Bài mk đây nha
Xin chủ tus cutephomaique 1 cái ctlhn, cảm ơn,5⭐
`a) 7/15 + 4/5 – 1/3`
`= 7/15 + 12/15 – 5/15`
`= 19/15 – 5/15`
`= 14/15`
`b) 2/3 – 1/8 : 1/3`
`= 2/3 – 1/8 × 3/1`
`= 2/3 – 3/8`
`= 16/24 – 9/24`
`=7/24`
`c) 4/5 × 5/8 – 1/4`
`= 1/2 – 1/4`
`= 2/4 – 1/4`
`=1/4`
`d) 1/2 : ( 29/35 – 3/7 )`
`= 1/2 : ( 29/35 – 15/35 )`
`= 1/2 : 2/5`
`= 1/2 × 5/2`
`= 5/4`
$#Cho mik xin ctlhn.$