2. 1 Multiplication By Decimals Stage 4 Years 7 & 8 Press Ctrl-A ©2009 G Dear – Not to be sold/Free to use

3. 2 1. 1. Ignore the decimal points & multiply the whole numbers. 2.decimal point total 2. Insert the decimal point so that the number of decimal places in the answer equals the total number of decimal places in the question. End of Slides

4. 3 Long Multiplication 13.5 x 2.3. 1 3 5 2 3 5 x 2 1 0. 3 x 2 0 6 1 x 2 0 2 5 x 3 1 5 3 x 3 0 9 1 x 3 0 3 50 1 1 1 3 0 3 1 0 5 3 1 0 5. 0 = End of Slides

5. 4 Long Multiplication 2.47 x 4.7. 2 4 7 4 7 7 x 4 2 8. 4 x 4 1 6 2 x 4 0 8 7 x 7 4 9 4 x 7 2 8 2 x 7 1 4 90 2 6 1 1 1 = 1 1 6 0 9. 1 End of Slides

6. 5 Long Multiplication 9.12 x 2.1. 9 1 2 2 1 2 x 2 0 4. 1 x 2 0 2 9 x 2 1 8 2 x 1 0 2 1 x 1 0 1 9 x 1 0 9 25 1 1 9 1 = 1 9 1 5 2. End of Slides

7. 6. 0 0.3 x 0.3 = 1 3 decimal places 30 4 decimal places b) b) 0.5 x 0.006 = a) a) 1.5 x 0.9 = Working 15 x 9 =5 4 13 1 35 2 decimal places. 5 x 6 = 30. c) c) 0.11 x 3.1 = 11 x 31 1 0 341. 00 3 3 14 3 0 2 decimal places d) d) (0.3) 2 =9 3 x 3 =9 0 0 End of Slides Multiplication

8. 7 g) 0.2 x 0.345=0.0690 h) 1.1 x 0.12=0.132 i) 0.08 x 0.3=0.024 j) 1.5 x 2.1=3.15 k) 0.7x 1.1=0.77 l) 2.5 x 0.03=0.075 a) 0.4 x 0.5=0.20 b)0.12 x 0.4=0.048 c) 1.3 x 1.3=1.69 d)0.6 x.05=0.030 e)0.3 x 2.1=0.63 f)2.5 x 0.05=0.125 Answer Answer Answer To see the answer click on any coloured disk. Answer Answer Answer Answer Answer Answer Answer Answer Answer End of Show