Mastering Multiplication of Two-Digit Numbers

This video tutorial teaches how to multiply two-digit numbers, starting with a review of multiplying a two-digit number by a one-digit number. It then progresses to multiplying two two-digit numbers, using examples like 21 x 32 and 42 x 14. The tutorial emphasizes the importance of aligning numbers correctly, adding zeros for place value, and summing partial products to find the final answer.

What is the first step in multiplying 32 by 4?

• Rewrite the numbers on top of each other

• Multiply the tens place first

• Multiply the numbers directly

• Add the numbers together

Tags

CCSS.4.NBT.B.5

What is the result of multiplying 4 by 2 in the problem 32 times 4?

• 16

• 12

• 8

• 6

Tags

CCSS.4.NBT.B.5

When multiplying 21 by 32, what should you do with the extra digit in the second number initially?

• Ignore it

• Add it to the first number

• Subtract it

• Multiply it first

Tags

CCSS.4.NBT.B.5

What is the result of multiplying 21 by 2?

• 21

• 42

• 63

• 84

Tags

CCSS.4.NBT.B.5

Why do you add a zero in the ones place when multiplying by the tens digit?

• To simplify the addition step

• To avoid mistakes

• To keep the value of the tens digit

• To make the calculation easier

Tags

CCSS.7.EE.B.3

What is the final answer when you add 42 and 630 in the problem 21 times 32?

• 672

• 742

• 812

• 902

Tags

CCSS.4.NBT.B.5

In the example of multiplying 42 by 14, what is the first number you calculate?

• 42 times 4

• 14 times 4

• 14 times 1

• 42 times 1

Tags

CCSS.4.NBT.B.5

What is the result of multiplying 42 by 4?

• 208

• 188

• 168

• 128

Tags

CCSS.5.NBT.B.5

What is the final step in the multiplication process?

• Add the two numbers together

• Multiply the tens place

• Rewrite the numbers

• Subtract the smaller number

Tags

CCSS.7.EE.B.3

What is the final answer when you add 168 and 420 in the problem 42 times 14?

• 488

• 588

• 688

• 788

Tags

CCSS.7.EE.B.3