Đáp án:
Bạn tham khảo nha
I
Câu `1`
B : `9/25`
Vì : `9/25` = `36/100` = `0,36`
Câu `2`
B : `11/4`
`3/4:3/8+3/4=24/12+3/4=24/12+9/12=33/12=11/4`
Câu `3`
C : `52/35` m²
`S=13/7×4/5=52/35`
Câu `4`
B : `1/7`
`35:5=7` `⇒=1/7`
II
Câu `1`
a)
`4` `1/3` + `2` `1/3`
= `13/3+7/3`
= `20/3`
b)
`6` `1/4` - `3` `1/2`
= `25/4-7/2`
= `25/4-14/4`
= `11/4`
c)
`7` `8/4` × `1` `4/5`
= `36/4×9/5`
= `81/5`
d)
`5` `3/4` : `2` `1/3`
= `23/4:7/3`
= `23/4×3/7`
= `69/28`
chúc bạn học tốt nha ^^
