The difference bar: generate hard subtractions

Learning Material  |  Interactive Lesson




Description
Learn how to split up numbers in your head. Use a linear partitioning tool to help find the difference between pairs of two-digit numbers such as 46 and 84. 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.
Objective
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
Mathematics
Numbers and Number Sense
Educators, Learners, Students

Copyright Information

Yes
Education Services Australia
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Technical Information

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