primary maths calculation strategies. addition 1 2 3 4 5 6 7 8 9 10
TRANSCRIPT
Primary MathsCalculation Strategies
Addition
1
2 3 4 5
6 7 8 9 10
3 and 2 more
Recording number sentences
5 + 2 = 7
7 = 5 + 2
5 = 5
1 + 4 = 2 + 3
Partitioning
36 + 45 = 30 + 40 + 6 + 5
= 70 + 11
= 81
23 + 14 = 37
45 + 31 = 76
Subtraction
1
2 3 4 5
6 7 8 9 10
2 less than 5
No Partitioning
73 – 26 = ??
well 70 – 20 = 50
but 3 – 6 ???
123 – 89 =34
Multiplication
6 x 3 = 18 and 3 x 6 = 18
Partitioning
23 x 5 = 10x5 + 10x5 + 3x5
= 50 + 50 + 15
= 115
Division
