1. Splash Screen

2. Lesson Menu Five-Minute Check (over Lesson 3–5) Main Idea Example 1:Multiply Two-Digit Numbers Example 2:Multiply Three-Digit Numbers

3. Main Idea/Vocabulary I will multiply up to a three-digit number by a two-digit number.

4. Example 1 Multiply Two-Digit Numbers The fastest human runner was clocked at 11 feet per second. How far will the runner run in 55 seconds? Step 1 Multiply the ones. 1 55 × 55 × 1 = 55 55 Step 2 Multiply the tens. 55 × 10 = 550 1 55 × 550 Estimate 55 × 11 55 × 10 = 550

5. Example 1 Multiply Two-Digit Numbers Step 3 Add. 55 + 550 = 605 11 55 × 550 605 Answer: So, the runner will run 605 feet in 55 seconds. +

6. 1.A 2.B 3.C 4.D Example 1 A.65 B.390 C.410 D.416 Find 13 × 32.

7. Example 2 Find 438 × 46. Step 1 Multiply the ones. 4646 438 × 438 × 6 = 2,628 2628 Step 2 Multiply the tens. 438 × 40 = 17,520 4646 438 × 2628 Step 3 Add. 2,628 + 17,520 = 20,148 17520 46 438 × 2628 17520 + 20148 Answer: So, 438 × 46 = 20,148. Estimate 438 × 46 400 × 50 = 20,000 Multiply Three-Digit Numbers

8. 1.A 2.B 3.C 4.D Example 2 A. 15,183 B. 15,283 C. 16,197 D. 16,225 Find 723 × 21.

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10. Resources Five-Minute Check (over Lesson 3–5) Image Bank Math Tool Chest Multiply Mentally

11. 1.A 2.B 3.C 4.D Five Minute Check 1 (over Lesson 3–5) Draw a picture to solve. Vanita has a piece of fabric that is 54 inches wide and two yards long. To make a headband, she needs 3 strips that are each 18 inches long and 3 inches wide. What is the largest number of headbands she can make from the fabric? A.16 headbands B.20 headbands C.24 headbands D.27 headbands

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