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Dividing Whole Numbers and Decimals
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Do Now: Take out your homework Silently work on the following problems 12345 - 678 78.7356-2.0956
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S.W.B.A.T Divide whole numbers and decimals
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Parts of Dividing We read it as: Dividend divided by the divisor equals the quotient Dividend ÷ Divisor = Quotient
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What’s the Dividend? 15 ÷ 3 25 ÷ 5 48 ÷ 8 144 ÷ 12
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What is the Divisor? 14 ÷ 2 25 ÷ 5 81 ÷ 9 120 ÷ 10
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Lets practice writing them 15 ÷ 3 25 ÷ 5 48 ÷ 8 144 ÷ 12 14 ÷ 2 25 ÷ 5 81 ÷ 9 120 ÷ 10
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Practice Problems: whole numbers 594 ÷ 9 40 ÷ 8 534 ÷ 3
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Now Let’s Work With Decimals When dividing by decimals, if the divisor is not a whole number, then move the decimal point to the right to make it a whole number and move the decimal point in the dividend the same number of places Divide as usual. Keep dividing until the answer terminates or repeats Put the decimal point directly above decimal point in the dividend
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Check your Answer! Once you have your answer, to check and make sure it is correct you will multiply the quotient by the divisor. If you are correct, the number you get will equal the dividend USE ROUNDING AND ESTIMATING
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What does it mean to round? Rounding means to make an approximation of your answer For example 1.29 is approximately 1.3 The directions will tell you what place to round to For example they can say round to the nearest HUNDREDTH and then your decimal will stop at the hundredths place value If the number next to the place value you are rounding to is GREATER THAN 5 the number goes up one and if it is LESS THAN 5 it stays the same
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Practice rounding Round to the nearest thousandth 1.45678 3.4387364 4.37852 0.023
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Remember! When you round, we no longer use the equal sign! The answer is not exactly equal to the number you have it is approximately equal In this case we use the approximation sign which is, ≈
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Let’s Practice Divide 5.39 by 1.1 I will do this on the board with you!
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