Multiplying Multi-Digit Numbers 5.NBT.7

APK : What We Already Know We already know how to multiply single-digit numbers. We already know how to multiply single-digit numbers. We already know about place value of digits. We already know about place value of digits.

Academic Vocabulary factor X factor = product factor X factor = product of and by are clue words that mean multiply of and by are clue words that mean multiply When multiplying multi-digit numbers, you might have to carry the digit in the tens place of the product, or bring to the top to be added in the next step. When multiplying multi-digit numbers, you might have to carry the digit in the tens place of the product, or bring to the top to be added in the next step.

Where we are headed.... It's important to know how to multiply multi-digit numbers because we will be learning how to multiply decimals this week.

Big Idea! Understand and explain the processes of adding, subtracting, multiplying, and dividing decimals to the hundredths.

Multiplying Double-Digit Numbers 1.Line numbers up by place value. 2.Multiply the digits in the ones place, and write the product in the answer box. 3.Multiply the digit in the ones place of the bottom number by the digit in the tens place of the top number. Write the product in the answer box under the tens place. 4.TIC TAC 0 5.Multiply the digit in the tens place of the bottom number by the digit in the ones place of the top number. Write the product in the answer box under the tens place. 6.Multiply the digit in the tens place of the bottom number by the digit in the tens place of the top number. Write the product in the answer box. 7.Add the two numbers in the answer box. Part 1 Part 3 Part x16 Whiteboard Example:

I DO: ★ TIC TAC 0 ★ 45 x32 x Part 3 Part 2 ★ 45 x32 x ★ 45 x 32 = ★ 45 x32 x Part

We Do: ★ TIC TAC 0 ★ 34 x17 x Part 3 Part 2 ★ 34 x17 x ★ 34 x 17 = ★ 34 x17 x Part

You Do: ★ TIC TAC 0 Part 3 Part 2 1.Multiply the digit in the tens place of the bottom number by the digit in the ones place of the top number. Write the product in the answer box under the tens place. 2.Multiply the digit in the tens place of the bottom number by the digit in the tens place of the top number. Write the product in the answer box. 3.Add the two numbers in the answer box. ★ 54 x 23 = 1.Line numbers by place value. 2.Multiply the digits in the ones place, and write the product in the answer box. 3.Multiply the digit in the ones place of the bottom number by the digit in the tens place of the top number. Write the product in the answer box under the tens place. Part 1

Whiteboard Time Explain TIC TAC 0 to your partner. We would add a step, and TIC TAC 00 How would the steps change if there were bigger numbers being multiplied? 24 x 15 = 53 x 12 = 72 x 23 =

Multiplying Multi-Digit Numbers 321 x 23 = 321 x 23 = to pay close attention! I DO:

Multiplying Multi-Digit Numbers 452 x 16 = 452 x 16 = We DO: to do this one with me!

Multiplying Multi-Digit Numbers 643 x 14 = 643 x 14 = You DO: Be tough & do this one on your own!

Explain why the ticket price on an item is different from the total price at the register. $19.99$19.99 Essential Question $21.49$21.49

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