Supporting Target Setting_Addition_level 3
TU + TU
HTU + HTU
mentally
Written
Two digit number add a
2 digit number mentally
□ = 55 + 78
50
78
Partitioning the smaller
and using the multiples
of ten as a benchmark
Partitioning both
numbers and adding the
tens numbers then the
units and totalling both
Adding a near multiple
of ten by adding the
nearest multiple of 10
and adjusting
□ = 55 + 78
70 + 50 = 120
8 + 5 = 13
120 + 13 = 133
2
128 130
26 + 29
Check that the children can subtract multiples of ten from two digit
numbers one jump. Discuss the similarities and differences between
56 – 30 and 56 –29
–30
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133
□ = 55 + 78
78 + 50 = 128
128 + 2 + 3 = 133
+1
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3
27
56
TU + TU
HTU + HTU
MENTALLY
Using facts to help you
find out what you don’t
know
18 + 16
Double 16 + 2 = 34 or Double 15 + 1 + 3 = 34
Use doubles to work out
near doubles
73 + 74
Double 75 – 2 – 1 =147 or double 70 + 4 + 3 = 147
Additional targets could
include:
Addition facts for all 2digit numbers to 100
mentally
How can you complete □ + ○ = 100
Add HTU – HTU using a
written method
Use expanded addition as a starting point and move on to compact
addition
Making decisions about
how to calculate based
on the size of the
numbers
Would I calculate 71+ 49, 86 + 36 and 57 + 96 in the same way?
Making decisions on
whether the 3 digit
subtractions would be
mental or written
Would the calculations 410 + 110, 425 + 199, 526 +347, 823 + 796 be
calculated with a mental or written method?
Applying their
understanding of
subtraction at level 3 to
word problems
There were 75 cakes and 68 scones baked for the cake sale. How
many are items are there to sell?
Applying their
understanding of
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
Choose 4 single digits. Can you arrange them into a
calculation so the answer is the largest possible, smallest
subtraction at level 3 to
reasoning problems
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

possible, even, odd, multiple of 2, multiple of 10, rounded to
50…
Using missing numbers eg 53 + □ = 91
Using a 100 square, find a square of 4 numbers
Eg 45 46
55 56
Add opposite numbers (45 + 56, 46 + 55) What do you notice?
What happen with other squares of 4 numbers? What about
squares of 9?