 # MU15L1D11 Decimal Fractions Unit 15, Lesson 1, Day 1.

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MU15L1D11 Decimal Fractions Unit 15, Lesson 1, Day 1

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.

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?

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.

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

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

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:

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?

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?

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

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.

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

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