Topic 9 Lessons 9-8, 9-9, 9-10.

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Presentation transcript:

Topic 9 Lessons 9-8, 9-9, 9-10

POD A group of 36 students goes on a school trip. Of all the students on the trip, 18 are in third grade. What is 18/36 in simplest form? A. 1/3 B. 4/12 C. 8/24 D. 1/2

POD A group of 36 students goes on a school trip. Of all the students on the trip, 18 are in third grade. What is 18/36 in simplest form? A. 1/3 B. 4/12 C. 8/24 D. 1/2

How can you write a fraction as a decimal? The word name for 3/10 is three tenths. What would three tenths look like as a decimal? 0.3 So, 3/10 = 0.3

A fraction such as 3/10 can be shown by a model.

Think about money… You know that $0.13 means 13 cents. What fraction of a dollar does this decimal represent? If there are 100 cents in a dollar… Then 13 cents is… 13/100 of a dollar

You try some 0.15 = 15/100 0.23 = ? 0.31 = ? 45/100 = 0.45 63/100 = ? 71/100 = ?

You try some 0.15 = 15/100 0.23 = 23/100 0.31 = 31/100 45/100 = 0.45 63/100 = 0.63 71/100 = 0.71 These are all hundredths

Now try these 4/10 = 0.4 6/10 = ? 2/10 = ? 0.9 = 9/10 0.7 = ? 1/10 = ?

Now try these 4/10 = 0.4 6/10 = 0.6 2/10 = 0.2 0.9 = 9/10 0.7 = 7/10 4/10 = 0.4 6/10 = 0.6 2/10 = 0.2 0.9 = 9/10 0.7 = 7/10 1/10 = 1/10 These are all what? Tenths

Now add whole numbers 9 3/10 = 9.3 3 23/100 = 3.23 4 5/10 = ? 9 3/10 = 9.3 3 23/100 = 3.23 4 5/10 = ? 6 43/100 = ?

Now add whole numbers 9 3/10 = 9.3 3 23/100 = 3.23 4 5/10 = 4.5 9 3/10 = 9.3 3 23/100 = 3.23 4 5/10 = 4.5 6 43/100 = 6.43

Textbook page 238-239 Lets look at #1-4 On your own do #12-27

Thousandths What would 0.454 look like as a fraction? Think about how you would say this number in word form… Four hundred fifty-four thousandths So… 454/1000

Try these 0.647 = 647/1000 0.342 = ? 0.876 = ? 142/1000 = 0.142 272/1000 = ? 943/1000 = ?

Try these 0.647 = 647/1000 0.342 = 342/1000 0.876 = 876/1000 142/1000 = 0.142 272/1000 = 0.272 943/1000 = 0.943

Textbook page 242 #1-8 together Homework: page 242 #11-26

Quick check POD What is 94/1000 as a decimal? B. 0.094 C. 0.0904 D. 0.0094 1. What is 0.008 as a fraction? 9/1 9/10 9/100 9/1000 A kitten weighed 0.128 kilograms when it was born. What is 0.128 as a fraction? 128/1000 128/100 128/10 128/1

Number line on the board

Fractions and decimals on a number line Where do you think these two should go? 0.5 and 1/10 0.4 and 7/10 1/2 0.5 1 0.4 7/10 1/10

Workbook pages 157-158 Homework/class work: quick check 9-11 Or textbook pages 244-245 #1-13 Homework/class work: quick check 9-11

Tomorrow Review for TEST