Multiplication Review

Estimation Station

Multiplication Rocks

Name that Property!

Grab Bag

100

Round each number to the tens place. Then, multiply to estimate.

X 8

______

50 x 10= 500

100

Solve:

48 x 2 =

100

8 x 0= 0

Word Bank: Commutative, Associative, Identity, Zero, Distributive

Zero Property

100

What is the answer to a multiplication problem called?

product

200

Round each number to the tens place. Then, multiply to estimate.

X 12

______

50 x 10 = 500

200

431 x 5 =

2,155

200

3 x 1 = 3

Word Bank: Commutative, Associative, Identity, Zero, Distributive

Identity Property

200

What is the name for the numbers getting multiplied together?

factors

300

Round the first number to the hundreds place and the second number to the tens place. Then, multiply to estimate..

329 x 38 =

300 x 40 = 12,000

300

86 x 45 =

3,870

300

4 x 8 =4 x 8

Hint: You can change the order, but the product will be the same.

Word Bank: Commutative, Associative, Identity, Zero, Distributive

Commutative Property

300

5 x 10^{3 =}

5 x 10³ = 5,000

400

Round the first number to the hundreds place and the second number to the hundreds place. Then, multiply to estimate.

982 x 143 =

900 x 100 = 90,000

400

97 x 51 =

4,947

400

6 x (3x8) = (6x3) x 8

Word Bank: Commutative, Associative, Identity, Zero, Distributive

Associative Property

400

48 x 10³⁼

48,000

500

Mrs. Landis wanted her students to practice flashcards for 13 minutes every day. If she has 23 students in her class, about how many minutes would the students practice each day?

Round each number to the tens place, then estimate to solve.

10 x 20 = 200 minutes

500

336 x 21 =

7,056

500

6 x 34 = (6x30) + (6x4)

Word Bank: Commutative, Associative, Identity, Zero, Distributive

Distributive Property

500

True or False: When you estimate a multiplication problem, you should round the numbers first, then solve.

True