Maths worksheets: Mental addition of three numbers. S5

Even more challenging: to add three larger numbers in your head. There are many different ways of going about these. Don’t forget the following tips, depending on the type of numbers involved:

adding the tens first before the units

add units which come to whole tens

start with the largest number.

Remember addition can be done in any order.

5401-01 Mental addition of three numbers (pg 1)

5401-02 Mental addition of three numbers (pg 2)

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