 • #### BIOGRAPHY REPORTS • #### COMMON CORE STATE STANDARDS • #### UNIT 9 - PERCENTS • #### BIOGRAPHY REPORT PROJECT • #### ENERGY • #### INDUSTRIAL REVOLUTION # Mrs. Tait's & Mrs. Fleischhauer's Class

### Unit 3 (Big Ideas Math) - Multiplying By One-Digit Numbers

Multiplying By One-Digit Numbers

In this chapter, your student is learning how to multiply one-digit numbers by tens, hundreds, and thousands. The lessons address how to estimate products by rounding, and to multiply using properties, expanded form, and partial products. The vocabulary words associated with this chapter are: Distributive Property and partial products.

Your student can practice multiplying by one-digit numbers while looking at prices at home or at the store!

• While shopping, look at whole-number price tags. For items that are less than \$10, ask your student to name a two-digit number, then find the total cost of that many of the item. For example, if a jar of peanut butter costs \$4, ask, “How could you find the total cost of 23 jars of peanut butter? What would the total cost be?” Encourage your student to explain more than one strategy for finding the answer. Have your student draw an area model and explain how it can be used to multiply.
• At home, look through advertisements for items that have a three-digit price. Have your student point out the digits in each place value. Then, have them use partial products to find the total cost of several of the items. Remember to select a single-digit number of items. For example, your student might select a \$425 TV. Guide your student to find the total cost of 3 TVs. Ask, “What is the product of 3 and 4 hundreds? What is the product of 3 and 2 tens? What is the product of 3 and 5 ones?” Then, have your student add the partial products. Continue by asking, “Can you find an item that costs about 3 times as much as your item? Is there an item that costs about 8 times as much?”
• Ask your student to name an item that might have a four-digit price. Look up the cost of the item online. Roll a number cube and have your student estimate the total cost of that many of the item. Then, have your student choose a strategy to multiply. Have your student compare the total cost with the estimate and explain whether the answer is reasonable. Encourage your student to think of word problems involving multiplication that you can solve together.

By the end of this chapter, your student should feel confident with the learning targets and success criteria listed below. Encourage your student to think of other contexts in which they multiply by one-digit numbers, such as finding the number of minutes in the hours they are in school each day, and then the minutes each week.

 Lesson Learning Target Success Criteria 3.1 Understand Multiplicative Comparisons Use multiplication to compare two numbers. ·I can write addition or multiplication equations given a comparison sentence. ·I can write a comparison sentence given an addition or a multiplication sentence. ·I can solve comparison word problems involving multiplication. 3.2 Multiply Tens, Hundreds, and Thousands Use place value to multiply by tens, hundreds, or thousands. ·I can find the product of a one-digit number and a multiple of ten, one hundred, or one thousand. ·I can describe a pattern when multiplying by tens, hundreds, or thousands. 3.3 Estimate Products by Rounding Use rounding to estimate products. ·I can use rounding to estimate a product. ·I can find two estimates that a product is between. -I can tell whether a product is reasonable. 3.4 Use the DistributiveProperty to Multiply Use the Distributive Property to Multiply. ·I can draw an area model to multiply. ·I can use known facts to find a product. ·I can explain how to use the Distributive Property. 3.5 Use Expanded Form to Multiply Use expanded form and the Distributive Property to multiply. ·I can use an area model to multiply. ·I can use expanded form and the Distributive Property to find a product. 3.6 Use Partial Products to Multiply Use place value and partial products to multiply. ·I can use place value to tell the value of each digit in a number. ·I can write the partial products for a multiplication problem. ·I can add the partial products to find a product. 3.7 Multiply Two-Digit Numbers by One-Digit Numbers Multiply two-digit numbers by one-digit numbers. ·I can multiply to find the partial products. ·I can show 10 ones regrouped as 1 ten. ·I can find the product. 3.8 Multiply Three- and Four-Digit Numbers by One-Digit Numbers Multiply multi-digit numbers by one-digit numbers. ·I can multiply to find the partial products. ·I can show how to regroup more than 10 tens. ·I can find the product. 3.9 Use Properties to Multiply Use properties to multiply. ·I can use the Commutative Property of Multiplication to multiply. ·I can use the Associative Property of Multiplication to multiply. ·I can use the Distributive Property to multiply. 3.10 Problem Solving: Multiplication Solve multi-step word problems involving multiplication. ·I can understand a problem. ·I can make a plan to solve using letters to represent the unknown numbers. ·I can solve a problem using an equation. (multiplication and division table from www.everydaymathonline.com)