Speaker: Addition is the process of adding 2 or more numbers or amounts together to get a total. If I start on the ground floor I've got to go up 9 floors to get to the top. That's 0 add 9, which ...
When we are asked to do a calculation for either addition, subtraction, multiplication or division, we will often decide whether to carry out the calculation ‘mentally’ or to use a ‘formal’ written ...
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