topic badge

3.06 Story problems with mixed operations

Lesson

Are you ready?

Let's try this problem to practice reading a story problem and then writing the number sentence that we would use to solve it. 

Tom has $60$60 chocolates to give out to $10$10 guests at his birthday party and wants to make sure each guest gets the same amount.

  1. Write a number sentence for this story problem to find how much each guest would get.

Learn

We can use numbers, pictures and symbols to solve number problems. Let's see how we can solve multiplication and division in this video.

Apply

question 1

Sally and her mom were at home. Her grandma came around to visit, then her dad and brother came home together.

  1. Which number sentence matches the number of people in the house?

    $1+1+2$1+1+2

    A

    $2+1+2$2+1+2

    B

    $2-1+2$21+2

    C

    $2+1-2$2+12

    D
  2. How many people are in the house altogether?

Learn

Sometimes we need more than one step to solve a number problem, so it helps to look at how to work through each step.

Apply

question 2

Quentin has $24$24cm of ribbon, which he cuts into $2$2 equal pieces.

He then selects one of these pieces, and cuts $3$3cm off it.

  1. How long is this piece of ribbon now?

Remember!
  • Mathematical problems can be represented with words, pictures and symbols.
  • If our problem has equal groups and we need to find a total, we use multiplication.
  • If we have to share our total into equal groups, we use division.

 

Outcomes

4.OA.3

Solve multi-step word problems posed with whole numbers and having whole-number answers using the four operations, including problems in which remainders must be interpreted.

4.OA.3.a

Represent these problems using equations with a letter standing for the unknown quantity.

4.OA.3.b

Assess the reasonableness of answers using mental computation and estimation strategies, including rounding.

What is Mathspace

About Mathspace