Download presentation

Presentation is loading. Please wait.

Published byMary Harrison Modified over 3 years ago

1
Mark Symmonds – Chatsworth International School, Singapore

3
Just like when we count, start from the left. 1, 2, 3, 4, 5, 6…

4
As we are looking for 3 multiplied by 9 we count across to our 3 rd finger and move it down. 1 2 3

6
Marker Finger 3 x 9 = 1 x 9 = 9 2 x 9 = 18 3 x 9 = 27 4 x 9 = 36 5 x 9 = 45

7
Marker Finger 7 x 9 = 1 x 9 = 9 2 x 9 = 18 3 x 9 = 27 4 x 9 = 36 5 x 9 = 45 6 x 9 = 54 7 x 9 = 63 8 x 9 = 72 9 x 9 = 81 10 x 9 = 90

8
Marker Finger 9 x 9 = 1 x 9 = 9 2 x 9 = 18 3 x 9 = 27 4 x 9 = 36 5 x 9 = 45 6 x 9 = 54 7 x 9 = 63 8 x 9 = 72 9 x 9 = 81 10 x 9 = 90

9
1 x 9 = 9 2 x 9 = 18 3 x 9 = 27 4 x 9 = 36 5 x 9 = 45 6 x 9 = 54 7 x 9 = 63 8 x 9 = 72 9 x 9 = 81 10 x 9 = 90 11 x 9 = 99 12 x 9 = 108

10
Remember there are no tens digit in 1 x 9 as the answer is 0 tens and 9 units! The tens digit is always one less than the number you are dividing! This pattern only works up until 10 x 9

11
1 x 9 = 9 2 x 9 = 18 3 x 9 = 27 4 x 9 = 36 5 x 9 = 45 6 x 9 = 54 7 x 9 = 63 8 x 9 = 72 9 x 9 = 81 10 x 9 = 90 11 x 9 = 99 12 x 9 = 108 9 added to nothing equals 9

12
If you add both the digits of the answer together they will always equal 9. The tens column in the answer is always one less than the one you are multiplying. So if we take 7 x 9… We know the answer will start with? So we know that the answer is 63. And the two digits added together make nine so 6 and what make 9? 3 6

17
so… 1980 so…

18
so… 5445 so…

19
so… 12177 so…

Similar presentations

OK

A few memorisation strategies …which might work for you! Please suggest others in the Comment box at the end of the blog post.

A few memorisation strategies …which might work for you! Please suggest others in the Comment box at the end of the blog post.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on sweat equity shares Ppt on fast food business Ppt on structures in civil engineering Ppt on bombay film industry Ppt on fast food business plan Ppt on abstract art prints Ppt on applied operational research journal Ppt on antenatal care Ppt on fair and lovely product Ppt on online banking