write what each expression mean.
5x
5 multiplied by an unknown #
x + 3 = 7
x = 4
A basket has some apples. 4 are taken out, and 6 are left. How many were there at first? Write the expression.
x - 4
x + 3
when x = 5
8
Sofia has 5 apples. She gets 3 more from her friend.
What operation would you use to find how many apples Sofia has now?
Addition
4 + a
4 plus an unknown #
5 + x = 12
x = 7
Sara has some books. She buys 2 more and now has 9. How many did she have before? Write the equation AND expression.
x + 2
x + 2 = 9
2x
when x = 4
8
Liam has 10 candies. He gives 4 to his sister.
What operation would you use to find out how many candies Liam has left?
7r
7 multiplied by unknown #
2x = 10
x= 5
Emma has some cookies. She eats 3 and now has 5 left. How many cookies did she have at first? Write the expression AND the equation
x - 3
x - 3 = 5
x - 7
when x = 12
5
Each student gets 3 pencils. There are 5 students.
What operation would you use to find the total number of pencils?
Multiplication
2/x
2 divided by unknown #
3x + 4 = 19
x= 5
Each student gets 3 pencils. There are n students. Write an expression for the total number of pencils.
3n
3x + 2
when x = 6
20
A baker has 24 muffins. She puts 6 muffins in each box.
What operation would you use to find out how many boxes she can fill?
Division
7x - 4
7 divided by unknown #, minus 4
4x - 5 = 11
x = 4
Each box has 5 apples. There are b boxes. Write an expression for the total number of apples. Write the expression AND solve if there are 4 boxes.
5b
5 x 4
5 x 4 = 20
3x - 5
when x= 4
7
A number is tripled, and then 4 is added.
What operations are used in this problem?