ENY Module 2, Lesson 12 Objective:

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Presentation transcript:

ENY Module 2, Lesson 12 Objective: I can reason about the product of a whole number and a decimal with hundredths using place value understanding and estimation.

Fluency Practice 12 in = 1 ft 1 ft = 12 in 4 ft = 48 in 24 in = 2 ft Solve: 12 in = 1 ft 1 ft = 12 in 4 ft = 48 in 24 in = 2 ft 2 ft = 24 in 4.5 ft = 54 in 36 in = 3 ft 2.5 ft = 30 in 9 ft = 108 in 3 ft = 36 in 48 in = 4 ft 9.5 ft = 114 in 120 in = 10 ft 3.5 ft = 42 in 27 ft = 324 in

Fluency Practice 8 hundredths 8 tenths 9 hundredths 9 tenths Write each in their decimal form: 8 tenths 8 hundredths 9 hundredths 9 tenths 10 tenths 10 hundredths 11 tenths 20 hundredths 19 tenths 90 hundredths 20 tenths 95 hundredths 35 tenths 199 hundredths 83 tenths 257 hundredths 47 tenths 463 hundredths

Application Problem

2.31 x 201 Concept Development: Problem #1 STEP 1: Round each factor to estimate the product. STEP 2: Multiply your rounded factors to estimate the product. STEP 3: Rename the decimal using tenths (multiply by 10). STEP 4: Multiply. STEP 5: Find the partial products and the final product. STEP 6: Convert your final product to standard form (divide by 10).

495 x 1.11 Concept Development: Problem #2 STEP 1: Round each factor to estimate the product. STEP 2: Multiply your rounded factors to estimate the product. STEP 3: Rename the decimal using tenths (multiply by 10). STEP 4: Multiply. STEP 5: Find the partial products and the final product. STEP 6: Convert your final product to standard form (divide by 10).

0.98 x 495 Concept Development: Problem #3 STEP 1: Round each factor to estimate the product. STEP 2: Multiply your rounded factors to estimate the product. STEP 3: Rename the decimal using tenths (multiply by 10). STEP 4: Multiply. STEP 5: Find the partial products and the final product. STEP 6: Convert your final product to standard form (divide by 10).

0.25 x 51 Concept Development: Problem #4 STEP 1: Round each factor to estimate the product. STEP 2: Multiply your rounded factors to estimate the product. STEP 3: Rename the decimal using tenths (multiply by 10). STEP 4: Multiply. STEP 5: Find the partial products and the final product. STEP 6: Convert your final product to standard form (divide by 10).

0.56 x 84 Concept Development: Problem #5 STEP 1: Round each factor to estimate the product. STEP 2: Multiply your rounded factors to estimate the product. STEP 3: Rename the decimal using tenths (multiply by 10). STEP 4: Multiply. STEP 5: Find the partial products and the final product. STEP 6: Convert your final product to standard form (divide by 10).

Problem Set Now it's your turn. Persevere for 10 minutes, on your own, then we'll work together.

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