THE 4 METHODSTHE 4 METHODS

All you need to know All you need to know about mathsabout maths

All you need to know All you need to know about mathsabout maths

AdditionAddition

249 Lets start with this249 Lets start with this

+682 sum. +682 sum.

249249 +682 so first you plus the +682 so first you plus the

2 with the 9 and put 2 with the 9 and put

and put the answer and put the answer

below it. If the below it. If the

answer is 10 or answer is 10 or

above you put it above you put it

under the next Columunder the next Colum..

249 now plus the 4 8 249 now plus the 4 8

+682 and the one. +682 and the one. 11 11

249249 +682+682 3131 1 11 1

249 Finally plus the 2 6249 Finally plus the 2 6 +682 and 1.+682 and 1. 931931 111111

And the answer is 931!And the answer is 931!

Colum subtractionColum subtraction

317-317-

257 I think we 257 I think we can do this can do this one one

317- minus the 7 from 317- minus the 7 from 257 the 7.If it was 8-7257 the 7.If it was 8-7 we would have towe would have to borrow. borrow.

317_ We cant do 1-5 so we 317_ We cant do 1-5 so we

257 borrow 1 from the 3 and 257 borrow 1 from the 3 and 0 and the 1 turns into 110 and the 1 turns into 11..

2121

317_ now 2 minus 2 317_ now 2 minus 2

257257

6060

2121 317317 257257 060060

multiplicationmultiplication

in column multiplication youin column multiplication you Cant borrow you carryCant borrow you carry

23t23t 2 first do 3 times 22 first do 3 times 2