Before you practice the work from this chapter, take some time to go over some of the multiplication and division strategies and problems we've looked at. These include:

using arrays to solve multiplication and division problems
partitioning, or splitting numbers to solve multiplication problems
using an area model to solve division problems
using a standard algorithm to solve multiplication and division problems

With these strategies, we were able to move on to multiplication of two digit numbers by two digit numbers. We were also able to solve division problems with remainder, as well as dividing by two digit numbers.

Apply

Question 1

Let's use the area model to find $97\times3$97×3.

Fill in the areas of each rectangle.

	$90$90	$7$7
$2$2	$\editable{}$	$\editable{}$
$2$2	$\editable{}$	$\editable{}$
$1$1	$\editable{}$	$\editable{}$

What is the total area of all four rectangles?
So what is $97\times3$97×3?

Question 2

Find $4316\times4$4316×4.

Question 3

Find the value of $884\div4$884÷4.

Remember!

We have different ways we can solve multiplication and division problems, and as our numbers get larger, the algorithm method can be more useful. Being able to regroup (trade), as well as find remainders with division is important.

Outcomes

4.4b

estimate and determine sums, differences, and products of whole numbers;

4.4c

Estimate and determine quotients of whole numbers, with and without remainders

4.4d

Create and solve single-step and multistep practical problems involving addition, subtraction, and multiplication, and single-step practical problems involving division with whole numbers

PRACTICE: Multiplication and division

Practice