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Published byGrace Curtis Modified over 9 years ago
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Divide with decimals Standard UW.GAP.5.M.NBT.07 Add, subtract, multiply, and divide decimals to hundredths using concrete models or drawing and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.
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Essential Questions 1. What is addition? How do you add decimals?
2. What is subtraction? How do you subtract decimals? 3. What is multiplication? How do you use a model and partial products to represent multiplying decimals? 4. What is division? How do you use a model and partial products to represent dividing decimals?
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Set.... Think about the strategies we use to divide whole numbers....
Take turns with your face partner and describe how we multiply and divide whole numbers.
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Objective I can divide decimals to hundredths place.
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Decimal - a number with a fraction of tenths, hundredths, etc
Decimal - a number with a fraction of tenths, hundredths, etc. written after a decimal point. Decimal point - the (.) between a whole number and fractions of tenths, hundredths, thousandths, etc. Digit- any of the numerals 0-9, which may be part of a larger number. x = Let’s Review Again
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Rules for Dividing Decimals
To divide decimals, divide as you would with a normal whole number then you move over the decimal.
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Estimate, Multiply, Subtract, Bring Down, Start again/Stop
Dividing Decimals Example 2 Solve = 2.25 ÷ 2.5 2.5)2.25 Estimate, Multiply, Subtract, Bring Down, Start again/Stop Divisor Dividend
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Divide as with whole numbers.
Dividing Decimals Example 2 Solve = 2.25 ÷ 2.5 2.5)2.25 -0 225 Divide as with whole numbers.
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Dividing Decimals Divide as with whole numbers. Example 2
Move decimal from 2.5 (divisor) over 1 to “get rid of it” Move the decimal over that same amount of spaces in the dividend. Then move decimal straight up. Example 2 Solve = 2.25 ÷ 2.5 0.9 25)22.5 -0 225 -225 Answer: 0.9
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Now let’s try one together
.46 ÷ 1.2
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Now you do one 15.2 ÷ 4.1
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Lesson on Dividing Decimals
decimals-using-knowledge-of-multiplication
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You and a partner try... Using what you learned in the lesson, using pictures, models, and properties of operations solve this problem with your partner... 26.4 ÷ .03
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Closure Think about what is different about dividing whole numbers and dividing decimals Write a $2 summary explaining what is different Repeat todays objective
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Let’s watch a fun video about dividing decimals
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Independent Practice!!! (yay)
1) ÷ .03 = 2) ÷ 05 = 3) ÷ .6 = 4) ÷ 1.2 = 5) ÷ .9 = 6) ÷ 1.0 = 7) ÷ .08 = 8) ÷ .4 =
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