15 giờ có 900 phút

\(\frac{1}{5}\)giờ = 12 phút 

Chúc bạn học tốt.

😁😁😁

a) Don’t ( let/ lets ) ………..…………………….your child play with a knife.

b) Mary (cook / is cooking )  ………..……………………..in the kitchen now.

c) Where are you, Peter?I( am / is ) ………..…………………….upstairs, Mom.

d)Jimmy ( climbs/ climbed ) ………..…………………….the apple tree yesterday. He fell and broke his leg.

e) Look! He( is running / runs ) ………..…………………….down the stair. He may break his arm.

f) Mary ( have / has ) ………..…………… a toothache. She should go to the dentist tomorrow.

g) Linda (wash/ washes ) ………..……………………her hair three times a week.

h) Last Monday, My mother(had/ have )………..……………………a bad pain in her stomach.

i) Mary shouldn’t ( rides/ ride )……..………………too fast because she may fall off her bike and break her leg.

j)  My mother has a pain in her throat. She (have /has ) ………..…………………… a sore throat.

k)  You should ( eat/ eats ) ……..……………… a lot of sweets.

a) let.

b) is cooking.

c) am.

d) climbed.

e) is running.

f) has.

g) washes.

h) had.

i) ride.

j) has.

k) eat.

(P/S: Tui chưa chắc đúng hoàn toàn, có gì sai thì nhấn ''sai'' cho tui để tui biết nhé:)

x=1/10

x=24/35

x+\(\frac{2}{5}=\frac{1}{2}\)

x= \(\frac{1}{2}-\frac{2}{5}\)

x=\(\frac{1}{10}\)

b, x- \(\frac{2}{5}=\frac{2}{7}\)

    x=\(\frac{2}{7}+\frac{2}{5}\)

\(x=\frac{24}{35}\)