




To find the answers using mental addition, you will need to make sure you partition the numbers first then add the larger units together followed by the smaller units, once you have two new numbers you add these together to give you the answer.For mental subtraction you follow
the same steps but this time you are using subtraction instead of addition
Practice answering some more questions using your calculator. Buy Primary Maths Books here!
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Mental addition and subtraction
Solve using mental maths strategies
a)  = 
b)  = 
c)  = 
d)  = 
e)  = 