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Mental Addition of 9
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Mental Addition of 9
Try adding 10, then taking away 1. Work out each answer mentally where you can.
Quick mental addition
Find each total.
1.8 + 9 = _____
2.16 + 9 = _____
3.32 + 9 = _____
4.7 + 9 = _____
5.25 + 9 = _____
6.5 + 9 = _____
Addition stories
Read each story and work out the total.
7.Sione has 14 shells. She finds 9 more at the beach. How many shells does she have now?
8.A fruit bowl holds 26 mandarins. Lee adds 9 mandarins. How many mandarins are in the bowl now?
9.There are 38 books on a trolley. A teacher puts 9 more books on it. How many books are on the trolley altogether?
10.Levi scores 9 points in each of two rounds of a game. How many points does he score altogether?
Challenge
Think carefully about how addition by 9 works.
11.Fill the gap: 36 + _____ = 45
12.Show how you could work out 47 + 9 by adding 10 and then adjusting your answer. Write the steps.
3 printable pages
Page 1
Page 2
Page 3
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