Mastering Fast Multiplication of Two-Digit Numbers

What is the first step in the two-digit by two-digit multiplication trick?

• Multiply the tens digits

• Subtract the numbers

• Multiply the unit digits

• Add the numbers

Tags

CCSS.4.NBT.B.5

What is the product of the unit digits in the example given (2 and 3)?

• 5

• 6

• 7

• 8

Tags

CCSS.3.OA.D.9

What do you do after multiplying the inside and outside numbers?

• Add their products

• Divide their products

• Multiply their products

• Subtract their products

Tags

CCSS.6.EE.A.1

What is the sum of the products of 5 times 3 and 2 times 8?

• 29

• 30

• 32

• 31

Tags

CCSS.6.EE.A.1

What is the next step after adding the products of inside and outside numbers?

• Multiply the unit digits again

• Write the whole number

• Carry over the tens digit

• Subtract the tens digit

Tags

CCSS.5.NBT.B.5

What is the product of the tens digits in the example (5 and 8)?

• 30

• 35

• 40

• 45

Tags

CCSS.4.NBT.B.6

What is the final answer after carrying over in the example problem?

• 4320

• 4316

• 4322

• 4324

Tags

CCSS.6.NS.B.3

In the sample problem, what is the sum of 1 times 8 and 2 times 5?

• 18

• 17

• 16

• 19

Tags

CCSS.6.NS.B.4

What is the final answer for the sample problem from the UIL test?

• 420

• 422

• 424

• 426

Tags

CCSS.4.OA.A.3