Number sense and numeration

1. Number sense and numeration Introduction to Decimals – Tenths and Hundredths

2. 4.67 This number is a decimal number It has two parts: whole number decimal fraction 4 .67

3. $4.67 To make things easier, this number can be split into two parts: whole number of dollars parts of a dollar (cents) $4 .67

4. 3 100 5 100 4 100 1 100 2 100 If each square is one penny how much is the square worth?? 100¢ = $1.00 1¢ = = $0.01 2¢ = = $0.02 3¢ = = $0.03 4¢ = = $0.04 5¢ = = $0.05

5. 8 100 10 100 9 100 6 100 7 100 If each square is one penny how much is the square worth??? 100¢ = $1.00 6¢ = = $0.06 7¢ = = $0.07 8¢ = = $0.08 9¢ = = $0.09 10¢ = = $0.10

6. 15 14 13 11 12 100 100 100 100 100 If each square is one penny how much is the square worth??? 100¢ = $1.00 11¢ = = $0.11 12¢ = = $0.12 13¢ = = $0.13 14¢ = = $0.14 15¢ = = $0.15

7. 20 19 18 16 17 100 100 100 100 100 If each square is one penny how much is the square worth??? 100¢ = $1.00 16¢ = = $0.16 17¢ = = $0.17 18¢ = = $0.18 19¢ = = $0.19 20¢ = = $0.20

8. 100¢ = $1.00 If each square is one penny how much is the square worth??? $0.10 = 10¢ $0.20 = 20¢ $0.30 = 30¢ $0.40 = 40¢ $0.50 = 50¢ $0.60 = 60¢ $0.70 = 70¢ $0.80 = 80¢ $0.90 = 90¢ $1.00 = 100¢

9. 100¢ = $1.00 If each square is one penny how much is the square worth???

11. Tenths and Hundredths on Number Lines 2.00 2.10 2.20 2.30 2.40 2.50 2.60 2.70 2.80 2.90 3.00 2.17 2.18 2.19 2.20 2.10 2.11 2.12 2.13 2.14 2.15 2.16

12. More Tenths and Hundredths on Number Lines 2.00 2.10 2.20 2.30 2.40 2.50 2.60 2.70 2.80 2.90 3.00 2.47 2.48 2.49 2.50 2.40 2.41 2.42 2.43 2.44 2.45 2.46

13. Even More Tenths and Hundredths on Number Lines 2.00 2.10 2.20 2.30 2.40 2.50 2.60 2.70 2.80 2.90 3.00 2.77 2.78 2.79 2.80 2.70 2.71 2.72 2.73 2.74 2.75 2.76

14. Adding Decimal Numbers (Tenths and Hundredths) to the Place Value Chart

15. Writing Decimal Numbers in Words • When we write decimal numbers in words, we use the word “and” to show where the decimal would go, then we add the word that goes with the decimals (e.g. tenths, hundredths, thousandths and so on) following the decimal number

16. Practice Writing Numbers in Words using Decimal Numbers Write the number 8935.67 in words eight thousand nine hundred thirty-five and sixty-seven hundredths Write the number 649 092.9 in words six hundred forty-nine thousand ninety-two and nine tenths Write the number 158.95 in words one hundred fifty-eight and ninety-five hundredths Write the number 7463.15 in words seven thousand four hundred sixty-three and fifteen hundredths Write the number 16 961.346 in words sixteen thousand nine hundred sixty-one and three hundred forty-six thousandths

17. On Your Own • Answers questions #4a), 5, 7, 8 from your textbook on page 43 • Use the title Number Sense and Numeration: Decimal Hundredths • Don’t forget to write the date