The difference bar: make your own easy subtractions

Learning Material  |  Interactive Lesson

Learn how to split up numbers in your head. Use a linear partitioning tool to help find the difference between pairs of numbers such as 8 and 64. Choose your own pairs of numbers (a single-digit number and a two-digit number). Split the numbers into parts that are easy to work with, work out each part and then solve the original calculation. This learning object is one in a series of five objects.
1. Students use a linear model to solve differences mentally.
2. Students partition numbers and investigate strategies to solve differences mentally.
3. Students apply the associative principle to solve differences mentally.

Curriculum Information

K to 12
Grade 4, Grade 3, Grade 5, Grade 6
Numbers and Number Sense
Educators, Learners, Students

Copyright Information

Education Services Australia
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