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Math 5 Read, write decimals to the thousandths Instructor: Mrs. Tew Turner.

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Presentation on theme: "Math 5 Read, write decimals to the thousandths Instructor: Mrs. Tew Turner."— Presentation transcript:

1 Math 5 Read, write decimals to the thousandths Instructor: Mrs. Tew Turner

2 In this lesson you will learn about place value with decimals and the patterns that we find in the base 10 system.

3 1 Minute Math Warm-up! a)17 + 12= b)21 + 37= c)36 + 23= d)54 + 45= e)13 + 9 = f)29 + 11= g)64 + 18= h)73 + 37= http://timer.onlineclock.net/

4 Math Warm-up a)17 + 12= 39 b)21 + 37= 58 c)36 + 23= 59 d)54 + 45= 99 e)13 + 9 = 22 f)29 + 11= 40 g)64 + 18= 82 h)73 + 37= 110

5 Decimal place value is very similar to whole number place value. Every number has a place to hold. However, decimals are numbers LESS than ONE WHOLE number otherwise known as a FRACTION.

6 All numbers that are decimals end with a “ths” to represent a number that is less than one or a fraction.

7 1 WholeTenths Hundredths Thousandths

8 “AND”: How you SAY the DECIMAL POINT. Decimal numbers always represent LESS THAN ONE!

9 Let’s Practice reading decimal numbers! 1)1.982 You say, “One AND Nine hundred eighty two thousand ths.”

10 Let’s Practice reading decimal numbers! 2) 456.367 You say, “Four hundred fifty six AND three hundred sixty seven thousand ths.”

11 Let’s Practice reading decimal numbers! 3) 4,687.97 You say, “Four thousand, six hundred eighty seven and ninety seven hundred ths.”

12 Now lets work on recognizing and saying these numbers. Why are they less than one ? 0.3 = Three Tenths = this means you have 3 out of 10 items = 3/10 0.04 = Four Hundredths = this means you have 4 out of 100 items = 4/100

13 Draw The symbol for ONES, Tenths, Hundredths, & Thousandths. Make a chart like this in your notebook

14 Let’s look at an example: Thousands Hundreds Ones Decimal Tenths Hundredths Thousandths 942.739 Let’s read this number together.

15 Now let’s Practice We will look at the number, say the number, then say the fraction. 0.45Forty-five HUNDREDTHS45/100 0.07Seven HUNDREDTHS7/100 0.9Nine TENTHS9/10

16 0.306 Three Hundred-six THOUSANDTHS 306/1000 0.791 Seven Hundred Ninety-one THOUSANDTHS 791/1000 0.041 Forty-one THOUSANDTHS 41/1000 0.009 Nine THOUSANDTHS 9/1000

17 Quick Check Write each number in standard Form: 1) 60 + 0.6 + 0.03 + 0.007 + 8 Hundreds Tens Ones Decimal Tenths Hundredths Thousandths.

18 Quick Check Write each number in standard Form: 1) 60 + 0.6 + 0.03 + 0.007 + 8 Hundreds Tens Ones Decimal Tenths Hundredths Thousandths 68.637

19 Quick Check Write each number in standard Form: 2) Four and sixty-eight hundredths Thousands Hundreds Ones Decimal Tenths Hundredths Thousandths.

20 Quick Check Write each number in standard Form: 2) Four and sixty-eight hundredths Hundreds Tens Ones Decimal Tenths Hundredths Thousandths 4.68

21 Quick Check Give the VALUE of the underlined digit: 3) 4.737 Hundreds Tens Ones Decimal Tenths Hundredths Thousandths.

22 Quick Check Give the VALUE of the underlined digit: 3) 4.737 Hundreds Tens Ones Decimal Tenths Hundredths Thousandths 4.737

23 In your Math Notebook Explain how the number 3.453 has two 3’s. Why does each 3 have a different value? Hundreds Tens Ones Decimal Tenths Hundredths Thousandths.

24 In your Math Notebook Explain how the number 3.453 has two 3’s. Why does each 3 have a different value? Hundreds Tens Ones Decimal Tenths Hundredths Thousandths 3.453

25 Explain how the number 3.453 has two 3’s. Why does each 3 have a different value? The first 3 on the far left is a WHOLE number. The 3 on the far right represents the THOUSANDTHS place or a fraction: 3/1000: In your Math Notebook-guide

26 Continued explanation: The models show the value of the digit 3 in each of the different places it appears in the number 3.453. Thousandths SOUND LARGE but they are only slivers of a whole number. They are VERY SMALL! In your Math Notebook-guide

27 http:// tinyurl.com /33xep6y Scooter Quest

28 Today you learned how to read and write decimals to the thousandths Good Work with this lesson.


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