Videos to help Grade 5 students learn how to multiply decimal fractions by multi-digit whole numbers through conversion to a whole number problem and reasoning about the placement of the decimal.

Common Core Standards: 5.NBT.7, 5.OA.1, 5.OA.2, 5.NBT.1

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Lesson Plans and Worksheets for Grade 5

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Common Core For Grade 5

New York State Common Core Math Module 2, Grade 5, Lesson 11

Lesson 11 Concept Development

Problems 1 - 3

7.38 × 41

8.26 × 128

82.51 × 63

1. Estimate the product. Solve using the standard algorithm. Use the thought bubbles to show your thinking. (Draw an area model on a separate sheet if it helps you.)

1.38 × 32 ≈ _____×_____= ______

1. Estimate the product. Solve using the standard algorithm. Use the thought bubbles to show your thinking. (Draw an area model on a separate sheet if it helps you.)

3.55 × 89 ≈ _____×_____=_______

2. Solve using the standard algorithm.

b. 147.83 × 67

3. Use the whole number product and place value reasoning to place the decimal point in the second
product. Explain how you know.

c. If 46 × 1,239 = 56,994 then 46 × 123.9 = ______________

5. A living room measures 24 feet by 15 feet. An adjacent square dining room measures 13 feet on each
side. If carpet costs $6.98 per square foot, what is the total cost of putting carpet in both rooms?

This video demonstrates how to multiply decimal fractions in the hundredths place.

1. Estimate the product. Solve using the standard algorithm. Use the thought bubbles to show your thinking. (Draw an area model on a separate sheet if it helps you.)

a. 2.42 × 12 ≈______ × ______ = _______ b. 4.13 × 37 ≈ _______×______= _________

4. A slice of pizza costs $1.57. How much does 27 slices cost?

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