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MU15L1D11 Decimal Fractions Unit 15, Lesson 1, Day 1

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MU15L1D1 2 DPP B If you have two numbers to multiply and you don’t know the answer, you can break one of the multiplies into two numbers and multiply, then add the two answers together.

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MU15L1D1 3 Essential Question How does knowing and understanding that our number system is based on 1s, 10s and 100s help us do decimal fractions?

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MU15L1D1 4 Math Vocabulary common fraction; fraction – any fraction that is written with a numerator and denominator that are whole numbers. For example, 3/4 and 9/4 are both common fractions. decimal fraction; decimal – A fraction written as a decimal. For example, 0.75 and 9.4 are decimal fractions and 75/100 and 4/10 are called common fractions.

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MU15L1D1 5 Math Vocabulary hundredth – there are one hundred hundredths in a one tenth there are ten tenths in a one

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MU15L1D1 6 Essential Question How are tenths and hundredths like tens and hundreds?

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MU15L1D1 7 Part 1 The Flat as a Whole We will now use the flat as one whole. Before we used the bit as one whole. Work with your group to answer the following questions:

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MU15L1D1 8 The Flat as a Whole The flat is one whole. How many skinnies cover one flat? If the flat is one whole, a skinny is what fraction of a flat? Two skinnies are what fraction of one whole?

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MU15L1D1 9 The Flat as a Whole Six skinnies are what fraction of the flat or one whole? How many bits cover one flat? If the flat is one whole, what fraction is one bit?

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MU15L1D1 10 The Flat as a Whole What fraction is six bits? What fraction is twenty-one bits? How many bits make a skinny?

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MU15L1D1 11 Math Vocabulary Review common fraction; fraction – any fraction that is written with a numerator and denominator that are whole numbers. For example, 3/4 and 9/4 are both common fractions. decimal fraction; decimal – A fraction written as a decimal. For example, 0.75 and 9.4 are decimal fractions and 75/100 and 4/10 are called common fractions.

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MU15L1D1 12 Math Vocabulary Review hundredth – there are one hundred hundredths in a one tenth there are ten tenths in a one

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MU15L1D1 13 Essential Question Discussion How are tenths and hundredths like tens and hundreds?

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