Achievement Objectives
NA2-1: Use simple additive strategies with whole numbers and fractions.
Specific Learning Outcomes
Solve addition problems by using compatible numbers.
Description of Mathematics
Number Framework Stage 6
Required Resource Materials
Play money (Material Master 4-9).
Activity
Using Materials
Problem: “Find $89 + $527 + $11.”
Record the problem on the board or modelling book. This looks difficult. However, modelling 89 and 527 and 11 with play money and combining 89 + 11 as 100 makes it obvious that the answer is 100 + 527 = 627. Record the answer on the board or modelling book.
Using Number Properties
Examples: Use materials or imaging only if necessary. Most students should be able to transfer straight to : Word stories and recording for:
970 + 3 213 + 30, 99 + 89 + 11 + 1, 678 + 234 – 78, 234 – 89 –11, 992 + 3 456 + 8, 2 345 + 5 + 995 – 345 ...
Add to plan
Level Two