1. Division of decimals (by a whole number) When dividing a decimal by a whole number: Divide as you would for a whole number. There are NO remainders! If you need to, place zeros at the end of the number. Place a decimal point in the answer directly above the decimal point in the question. Year 7 mathematics: Decimals 15-Feb-16

2. Example 1 Evaluate the following without a calculator. 4 3 5 3 0 5·0 Add a zero Place the decimal point 9 6 7 5 3·5 0 2 6 5 7 6 0 8·0 Add a zero Place the decimal point 3 64 5 Year 7 mathematics: Decimals 15-Feb-16

3. Today’s work Year 7 mathematics: Decimals 15-Feb-16 Ex 7-10 All Questions Yesterday’s work Ex 7-08 1 st column Ex 7-09 Every 2 nd point

4. Division of decimals (by another decimal) How do you divide a decimal by another decimal? Year 7 mathematics: Decimals 15-Feb-16 YOU CAN’T HOWEVER If 20 ÷ 10 = 2, then 200 ÷ 100 = 2 If 8 ÷ 2 = 4, Then 800 ÷ 200 = 4 If 12 ÷ 0.6 = ? Then 120 ÷ 6 = the same If 15 ÷ 0.03 = ? Then 1500 ÷ 3 = the same

5. Division of decimals (by another decimal) How do you divide a decimal by another decimal? Year 7 mathematics: Decimals 15-Feb-16 We can’t, but we can multiply both numbers in the question by the same number (usually a power of 10) so that the divisor no longer has a decimal. 18 ÷ 0.3 is the same as180 ÷ 3 2.4 ÷ 0.8 is the same as 24 ÷ 8 1.56 ÷ 0.3 is the same as15.6 ÷ 3 Notice we don’t care if there are any decimals in the dividend, but we can’t have them in the divisor 0.0125 ÷ 0.05 is the same as1.25 ÷ 5

6. Division of decimals (by another decimal) Year 7 mathematics: Decimals 15-Feb-16

7. Division of decimals (by another decimal) Year 7 mathematics: Decimals 15-Feb-16 Evaluate 52.02 ÷ 3.4 Evaluate 3.904 ÷ 0.16

8. Today’s work Year 7 mathematics: Decimals 15-Feb-16 Exercise 7-11 Page 238-239 All questions Yesterday’s work Exercise 7-10 Page 237 All questions

9. Division of decimals (by another decimal) Year 7 mathematics: Decimals 15-Feb-16

10. Division of decimals (by another decimal) Year 7 mathematics: Decimals 15-Feb-16

11. Division of decimals Year 7 mathematics: Decimals 15-Feb-16