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Whole Class Review Activity Numbers and Operations

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Directions: 1. Review questions have been written. 2. Click the Spin Button. 3. When the wheel stops, click to view the question. 4. Groups discuss answer and post their solution. 5. Groups with the right answer gets that number of points. 6. After the question is discussed, click to check the answer.

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Solve. (9 + 5) –(4 x 3)

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PEMDAS 14 – 12 1 Parentheses

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Solve. 16 ÷ 2 + 6

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PEMDAS Division 8 + 6 Addition 14

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What number would make the statement true? [ ]+ 0.9 = 1

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I’ll subtract 0.9 from both sides to find out what goes in the space. - 0.9 =-0.9.0 0.1 [ ] = 0.1

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What number would make the statement true? 2.1 × ___ = 6.3

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To find the answer, I’ll use the opposite operation with the two numbers given. 6.3 ÷ 2.1 =3 3

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What number is missing from the pattern? 11, 22, 33, ___, 55 What is the rule?

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What number is missing from the pattern? 11, 22, 33, 44, 55 What is the rule? Counting by 11 (multiples of 11)

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What is the rule for the following pattern? 2, 3, 5, 9, 17, 33

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What is the rule for the following pattern? 2, 3, 5, 9, 17, 33 2 x 2 – 1 = 3 3 x 2 – 1 = 5 5 x 2 – 1 =9 9 x 2 – 1 = 17 x 2 – 1 = 33 Multiply by 2 then subtract 1.

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Eddie bought 5 toy planes for $9.00 each and 4 toy cars for $15 each. Write and solve an equation to show how much money Eddie spent.

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Eddie bought 5 toy planes for $9.00 each and 4 toy cars for $15 each. Write and solve an equation to show how much money Eddie spent. 5 x $9 + 4 x $15 = $45 + $60 = $105

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Michael cleans windows and sweeps driveways after school. He gets $10 for each driveway and $3 for each window. On Wednesday he cleaned 17 driveways and 40 windows. How much money did Michael make?

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Michael cleans windows and sweeps driveways after school. He gets $10 for each driveway and $3 for each window. On Wednesday he cleaned 17 driveways and 40 windows. How much money did Michael make? 17 x $10 + 40 x $3 = $170 + $120 = $290

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Beth gets $2/hour for babysitting on weekdays and $3/hour for babysitting on weekends. How much does she get paid for babysitting 3 hours on Thursday and 4 hours on Sunday? Write an equation and solve.

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Beth gets $2/hour for babysitting on weekdays and $3/hour for babysitting on weekends. How much does she get paid for babysitting 3 hours on Thursday and 4 hours on Sunday? Write an equation and solve. $2 x 3 + $3 x 4 = $6 + $12 = $18

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What is wrong with the solution below? 3(7 + 24) ÷ 3 21 + 24 ÷ 3 21 + 8 29

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What is wrong with the solution below? 3(7 + 24) ÷ 3 Work in parenthesis first. 21 + 24 ÷ 3 3(31) ÷ 3 = 93 ÷ 3 = 31 21 + 8 29

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38 x 10 = 38 x 100 = 38 x 1000 = What is the pattern?

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38 x 10 = 380 38 x 100 = 3800 38 x 1000 = 38000 What is the pattern? When multiplying by a power of 10 that is a whole number, count the number of zeroes and multiply by the non-zero numbers.

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Carlos earns $10 each week taking care of pets. About how much money will he earn in 48 weeks taking care of pets?

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Carlos earns $10 each week taking care of pets. About how much money will he earn in 48 weeks taking care of pets? $10 x 48= $480

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28 x 10 2 =2,800 28 x 10 3 = 28,000 What is the product of 28 x 10 4 ? Explain the pattern.

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28 x 10 2 =2,800 28 x 10 3 = 28,000 What is the product of 28 x 10 4 ? Explain the pattern. 28 x 10 2 =2,800 = 28 x 100 28 x 10 3 = 28,000 = 28 x 1,000 What is the product of 28 x 10 4 ? 28 x 10,000 Explain the pattern. The exponent is the number of zeros in the power of 10 as well as the number of 10’x to be used as factors.

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What happens to the decimal point in a number when the number is divided by 10? A. The decimal moves one place to the left. B. The decimal moves two places to the left. C. The decimal moves one place to the right. D. The decimal moves two places to the right.

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What happens to the decimal point in a number when the number is divided by 10? *A. The decimal moves one place to the left. B. The decimal moves two places to the left. Dividing by 100 C. The decimal moves one place to the right. Multiplying by 10 D. The decimal moves two places to the right. Multiplying by 100

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Michael buys 4 beyblades that cost $1.50 each. He gives the clerk a $10 bill. Write an expression that represents the amount of change he will receive.

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Michael buys 4 beyblades that cost $1.50 each. He gives the clerk a $10 bill. Write an expression that represents the amount of change he will receive. 4 x $1.50 = $6.00 $10 – $6 = $4.00

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Significant Figures. Significant Figure Rules 1) ALL non-zero numbers (1,2,3,4,5,6,7,8,9) are ALWAYS significant. 1) ALL non-zero numbers (1,2,3,4,5,6,7,8,9)

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