Mai thinks of a number x. What is the expression for the number she gets when she subtracts 4 from the number?
x-4
10
Chi thinks of a number y. What is the expression for the number she gets when she multiplies the number by 2 and then subtracts 1?
2y-1
15
Mai thinks of a number x. What is the expression for the number she gets when she subtracts 4 from the number and multiply the answer by 2?
2(x-4)
20
Rulers cost a VND each. Pencils cost b VND each. What is the total cost of 2 rulers and 3 pencils?
2a+3b
20
Linh is x years old. Miss K is twice as old as Linh. How old is Miss K?
2x
20
The price of one bag of flour is a VND and that of one bag of sugar is b VND. What is the total price of 4 bags of flour and 1 bag of sugar?
4a+b
20
Khanh has a box of n marbles. What is the total number of marbles Khanh has in the box when he takes out half of the marbles?
n/2
25
Quang has a box of n marbles. What is the total number of marbles Quang has in the box when he takes out a quarter of the marbles?
3n/4
25
Hieu has a box of n marbles. What is the total number of marbles Hieu has in the box when he doubles the number of marbles in the box and add an extra 5?
2n+5
25
Linh thinks of a number x. What is the expression for the number she gets when she divide it by 6 and subtract the result from 3?
2 - x/6
20
Khanh thinks of a number x. What is the expression for the number he gets when he multiply it by 6 and add 2 to the result?
6x+2
20
In one week, Giang spent x minutes on the internet. Minh spent 15 minutes less than Giang. What is the expression for expression for how long Minh spent on the internet.
