http://mathworld.wolfram.com/NapiersBones.html

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Task:
Use the method shown on the left to answer these questions;


1
a) 289 x 3 =
b) 542 x 4 =
c) 718 x 6 =
d) 694 x 7 =
e) 179 x 7 =
f) 652 x 7 =
g) 428 x 9 =
h) 537 x 6 =


2
a) 5 369 x 7 =
b) 4 859 x 3 =
c) 4708 x 5 =
d) 6257 x 8 =
e) 5398 x 9 =
f) 7 359 x 7 =

Extension - Double Digit Multiplication

Task:
1) Watch the video on the left. It will show you how to use Napier's Bones to complete double digit multiplication. 
(You can watch it as many times as you need if you get stuck)


2) Complete the questions below.


3) Create your own video to demonstrate how to use Napier's Bones when completing Multiplication sums


3.
a) 237 x 27=
b) 335 x 34=
c) 756 x 29 =
d) 482 x 45 =