Purpose
This is a level 2 number activity from the Figure It Out series. It relates to Stage 5 of the Number Framework.
Achievement Objectives
NA2-1: Use simple additive strategies with whole numbers and fractions.
Student Activity
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Specific Learning Outcomes
subtract 9
subtract 8
Required Resource Materials
FIO, Level 3, Basic Facts, Nines and Eights, page 4
Activity
This page provides a strategy for subtracting nine, which students often have difficulty doing. Encourage students to record their results so that they can see the patterns.
Answers to Activity
1. a. 4
b. 9
c. 7
d. 1
e. 17
f. 23
g. 66
2. To find the answer to a two-digit number minus 9, take 1 off the tens digit and add 1 to the ones digit, for example,
3. Take 1 off the tens digit and add 2 to the ones digit.
4. a. 6
b. 9
c. 15
d. 92
e. 46
Attachments
NinesAndEights.pdf409.02 KB
Add to plan
Level Two