Purpose
These exercises and activities are for students to use independently of the teacher to practice number properties.
Achievement Objectives
NA2-1: Use simple additive strategies with whole numbers and fractions.
Specific Learning Outcomes
solve subtraction problems by splitting numbers into parts
Description of Mathematics
Addition and subtraction, EA (Stage 5)
Required Resource Materials
Practice exercises with answers (PDF or Word)
Activity
Prior Knowledge
Identify ones and tens in any two digit number
Background
This activity uses place value partitioning as a strategy for solving subtraction problems. This strategy is useful in problems when the ones digit is the number being subtarcted is larger than the ones in the starting number, e.g. 41- 15.
Comments on the Exercises
Exercise 1
Asks students to identigy if the number has been correctly partitioned
Exercise 2
Asks students to complete the partition for the subtraction question.
Attachments
SubtractionInParts.pdf92.36 KB
SubtractionInParts.doc34.5 KB
Add to plan
Level Two