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Numeracy

Addition and Subtraction


Addition and Subtraction Stage 5
Solve addition and subtraction problems by using doubles
i.e. 8 + 7 =
8 + 8 = 16, 16 - 1 = 15
Solve addition and subtraction problems by using fives
i.e. 8 + 7 =
5 + 3 + 5 + 2
Solve addition and subtraction problems by using tens
i.e. 8 + 7 =
8 + 2 + 5
Solve 2 and 3 digit addition and subtraction problems by using tidy numbers
i.e. 29 + 18 =
39 + 1 is 30 so now add 17
Solve 2 and 3 digit addition and subtraction problems by using place value
i.e. 33 + 16 =
30 + 10 + 3 + 6

Addition and Subtraction Stage 6
Solve addition and subtraction problems using rounding and compensating
i.e. 394 + 79 =
(394 + 80) - 1
Solve addition and subtraction problems using equal additions
i.e. 403 + 97 =
406 - 100
Solve addition and subtraction problems using place value partitioning
i.e. 394 + 79 =
390 + 70 + 9 + 4
Solve addition and subtraction problems using reversing
i.e. 403 - 97
97 + ? = 403
Solve addition and subtraction problems using compatible numbers
45 + 37 + 65 =
(45 + 65) + 37
Solve addition problems using standard written form
Solve subtraction problems using standard written form
Use more than one strategy when solving addition and subtraction problems
Choose the most efficient strategy when solving addition and subtraction problems

Addition and Subtraction Stage 7
Solve addition and subtraction problems using rounding and compensating from tidy numbers
i.e. 3.2 + 1.95 =
(3.2 + 2) = 5.2 so 5.2 - 0.05 = 5.15
Solve addition and subtraction problems using place value partitioning
i.e. 6.03 - 5.8 =
6.03 - 5, 1.03 - 0.8 = 0.23
Solve addition and subtraction problems using reversing
i.e. 6.03 + 5.8 =
5.8 + ? =
Solve addition and subtraction problems using equal additions
i.e. 1.403 - 2.97 =
1.406 - 3.00
Solve addition and subtraction problems using standard written form
i.e. 4.94 - 1.57 =
Solve addition and subtraction problems using negative (integers)
i.e. 26 - 28 = -2
Solve addition and subtraction problems using simple equivalent fractions
i.e. 1/2 = 5/10 = 50/100
Use more than one strategy when solving addition and subtraction problems
Choose the most efficient strategy when solving addition and subtraction problems

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