Unit 4 Review

We started this unit by working on our multiplication skills and then using the standard algorithm!

Standard Algorithm!!

Draw

Using standard algorithm find 48 x 25.

Draw

Fill in the boxes to find the product.

Don't forget about all the place value work we did last unit!

We related multiplication with fractions!

We have so many strategies to quickly prove if a problem would be correct or not!

Mental Math Multiplication!

Multiple Choice

True or False: $$32\ x\ 4\ =\ 1,280\ \div\ 10$$

• True

• False

Multiple Choice

True or False: $$324\ x\ 28\ =\ 3,828\ \div\ 3$$

• True

• False

Multiple Choice

True or False: $$58\ x\ 99\ =\ 4,897$$

• True

• False

Multiple Choice

True or False: $$480\ x\ 25\ =\ 12,000$$

• True

• False

Sometimes we just need to use another multiplication strategy.

We can't forget our Ratio Tables!

Draw

Matthew wants to build craft stick birdhouses to sell at the crafts fair. Each birdhouse costs $3.50 to make. Use the ratio table to find the cost to make 21 birdhouses.

Multiple Choice

Sam is helping her aunt bag apples to sell at the market. They have 98 apples and they want to put 14 apples in each bag. How many full bags of apples will they have when they are done? What is a reasonable estimate for this problem?

• 5

• 6

• 7

• 8

Open Ended

Sam is helping her aunt bag apples to sell at the market. They have 98 apples and they want to put 14 apples in each bag. How many full bags of apples will they have when they are done? Solve the division problem and label your answer.