Multiplication Multiplication PracticePractice

Do you know how to multiply Do you know how to multiply with double digits?with double digits?

2288

x x 55

Lets try one together!Lets try one together!

Step 1Step 1

Multiply the Multiply the numbers together numbers together that are in the that are in the ones placeones place

44

2828

x 5x 5

00

Lets try one together!Lets try one together!

Step 1Step 1

8 x 5 = 408 x 5 = 40

I place the zero in I place the zero in the ones place and the ones place and the four is carried the four is carried and placed into the and placed into the tens placetens place

44

2288

x x 55

00

Lets try one together!Lets try one together!

Step 2Step 2

Multiply the number Multiply the number in the tens place in the tens place with the number in with the number in the ones place.the ones place.

44

2828

x 5x 5

00

Lets try one together!Lets try one together!

Step 2Step 2

5 x 2 = 105 x 2 = 10

When I multiplied I When I multiplied I got 10 but I can’t got 10 but I can’t forget about the 4 forget about the 4 that I carried!that I carried!

44

2288

x x 55

00

Lets try one together!Lets try one together!

Step 3Step 3

5 x 2 = 105 x 2 = 10

Now I need to add:Now I need to add:

10 + 4 = 1410 + 4 = 14

+

4 4

2828

x 5x 5

141400

Lets try one together!Lets try one together!

Step 3Step 3

5 x 2 = 105 x 2 = 10

Now I need to add:Now I need to add:

10 + 4 = 1410 + 4 = 14

+

2828

x 5x 5

140 140

Lets try one together!Lets try one together!

Final AnswerFinal Answer

Lets try 2 digit Lets try 2 digit MultiplicationMultiplication

Step 1Step 1

I start with the same I start with the same stepstep

Multiply the Multiply the numbers together numbers together that are in the that are in the ones placeones place

3322

x 1x 166

Lets try 2 digit Lets try 2 digit MultiplicationMultiplication

Step 1Step 1

6 x 2 = 126 x 2 = 12

I place the two in the I place the two in the ones place and the ones place and the one is carried and one is carried and placed into the placed into the tens place.tens place.

11

3232

x 16x 16

22

Lets try 2 digit Lets try 2 digit MultiplicationMultiplication

Step 2Step 2

Multiply the number Multiply the number in the tens place in the tens place with the number in with the number in the ones place.the ones place.

11

3322

x 1x 166

22

Lets try 2 digit Lets try 2 digit MultiplicationMultiplication

Step 2Step 2

6 x 3 = 186 x 3 = 18

When I multiplied I When I multiplied I got 18, but I can’t got 18, but I can’t forget about the 1 forget about the 1 that I carried!that I carried!

1 1

3322

x 1x 166

22

Lets try 2 digit Lets try 2 digit MultiplicationMultiplication

Step 3Step 3

6 x 3 = 186 x 3 = 18

Now I need to add:Now I need to add:

18 + 1 = 1918 + 1 = 19

11

3322

x 1x 166

191922

+

Lets try 2 digit Lets try 2 digit MultiplicationMultiplication

Step 4Step 4

““Monkey see, Monkey Monkey see, Monkey do”do”

The monkey was The monkey was watching you! All the watching you! All the steps you did with the steps you did with the number in the ones number in the ones place, you repeat with place, you repeat with the number in the the number in the tens placetens place

3232

x 16x 16

192192

Lets try 2 digit Lets try 2 digit MultiplicationMultiplication

Step 4Step 4

Before the monkey Before the monkey can repeat the steps can repeat the steps he needs to put he needs to put down his banana. down his banana.

In Math we use a zero, In Math we use a zero, otherwise known as otherwise known as the placeholder.the placeholder.

3232

x 16x 16

192192

Lets try 2 digit Lets try 2 digit MultiplicationMultiplication

Step 5Step 5

Multiply the number Multiply the number that is in the tens that is in the tens place with the place with the number in the ones number in the ones place. place.

3232

x 16x 16

192192

Lets try 2 digit Lets try 2 digit MultiplicationMultiplication

Step 5Step 5

1 x 2 = 21 x 2 = 2

I place the two in the I place the two in the tens place next to tens place next to the banana (zero).the banana (zero).

3322

x x 1166

192192

22

Lets try 2 digit Lets try 2 digit MultiplicationMultiplication

Step 6Step 6

1 x 3 = 31 x 3 = 3

I place the three in I place the three in the hundreds place the hundreds place next to the two.next to the two.

3322

x x 1166

192192

3322

Lets try 2 digit Lets try 2 digit MultiplicationMultiplication

Step 7Step 7

Now I need to add Now I need to add the products of my the products of my multiplication.multiplication.

3232

x 16x 16

192192

+32+32

Lets try 2 digit Lets try 2 digit MultiplicationMultiplication

Step 7Step 7

Add each number Add each number carefully, make carefully, make sure you carry sure you carry when you need towhen you need to

2 + 0 = 22 + 0 = 2

9 + 2 = 119 + 2 = 11

3 + 1 + 1 = 53 + 1 + 1 = 5

3232

x 16x 16

192192

+32+32

512512

1

Lets try 2 digit Lets try 2 digit MultiplicationMultiplication

Final AnswerFinal Answer

3232

x 16x 16

512512

Practice ProblemsPractice Problems

Get a scratch piece of paper and a monkey Get a scratch piece of paper and a monkey to help you with these practice problemsto help you with these practice problems

1. 21 x 15 = ?

2. 45 x 24 = ?

3. 67 x 31 = ?

4. 20 x 18 = ?

5. 16 x 45 = ?

Practice ProblemsPractice Problems

Answers:Answers:

1. 21 x 15 = 315

2. 45 x 24 = 1,080

3. 67 x 31 = 2,077

4. 20 x 18 = 360

5. 16 x 45 = 720

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