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Multiplying Decimals Unit 3.5 Pages 126-128

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1. 87 x 320 = 2.943 x 800 = 3.3,806 x 10 = 27,840 754,400 38,060 Warm Up Problems Multiply

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3.5 Multiplying Decimals. Objective: by the end of class students can multiply whole numbers and numbers with decimals.

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We follow the same rules for multiplying whole numbers, as we multiply numbers with decimals in them. 258 x 37 2.58 x 3.7 9546

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equal The total number of decimal places in the equation will need to equal the total number or decimal places in the solution. 2.58 x 3.7 9.546 2 places 1 place 3 places total

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Showing the same equation in fractions can help us understand how we come up with a solution. 3.7 x 2.58 37 x 258 10 100 = 9546 1,000 = 9.546

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First multiply the equation like you normally would. Count the total number of decimal places in the problem. The product (or answer) needs to have the same number of decimal places too. Find each Product 3 x.17 0.17 x 3 0 51

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First multiply the equation like you normally would. Count the total number of decimal places in the problem. The product (or answer) needs to have the same number of decimal places too. Find each Product 0.2 x 0.6 0.2 x 0.6 0 12

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First multiply the equation like you normally would. Count the total number of decimal places in the problem. The product (or answer) needs to have the same number of decimal places too. Find each Product 3.25 x 4.8 3.25 x 4.8 15 600

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First multiply the equation like you normally would. Count the total number of decimal places in the problem. The product (or answer) needs to have the same number of decimal places too. 0.6 x 0.4 0.6 x 0.4 0.24 #3 find each product

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First multiply the equation like you normally would. Count the total number of decimal places in the problem. The product (or answer) needs to have the same number of decimal places too. 0.008 x 0.5 0.008 x 0.5 0.0040 #4 find each product

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First multiply the equation like you normally would. Count the total number of decimal places in the problem. The product (or answer) needs to have the same number of decimal places too. 3.0 x 0.07 3.0 x 0.07 0.21 #5 find each product

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First multiply the equation like you normally would. Count the total number of decimal places in the problem. The product (or answer) needs to have the same number of decimal places too. 0.12 x 0.6 0.12 x.06 0.0072 #6 find each product

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multiply the equation like you normally would. Count the total number of decimal places in the problem. The product (or answer) needs to have the same number of decimal places too. Evaluating decimal Expressions x= 4.047 3 x 4.047 Replace the variable with the given number. 4.047 x 3 12 141

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multiply the equation like you normally would. Count the total number of decimal places in the problem. The product (or answer) needs to have the same number of decimal places too. Evaluating decimal Expressions x= 2.95 3 x 2.95 Replace the variable with the given number. 2.95 x 3 8 85

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First multiply the equation like you normally would. Count the total number of decimal places in the problem. The product (or answer) needs to have the same number of decimal places too. x= 3.304 3.304 x 5 16.52 #7 Evaluate 5x Replace the variable with the given number. x

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First multiply the equation like you normally would. Count the total number of decimal places in the problem. The product (or answer) needs to have the same number of decimal places too. x= 7.126 7.126 x 5 35.63 #8 Evaluate 5x Replace the variable with the given number. x

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First multiply the equation like you normally would. Count the total number of decimal places in the problem. The product (or answer) needs to have the same number of decimal places too. x= 4.58 4.58 x 5 22.90 #8 Evaluate 5x Replace the variable with the given number. x

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First multiply the equation like you normally would. Count the total number of decimal places in the problem. The product (or answer) needs to have the same number of decimal places too. x= 1.9 1.9 x 5 9.5 #10 Evaluate 5x Replace the variable with the given number. x

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3.5 Homework page 124-125 Due: 8-29 Mrs. Saucedo’s Class 14-29

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0.8 x 0.07 0.006 x 0.07 0.056 6.43221.64 0.00042 Find each product 8x x = 2.705 8x x = 0.804

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