The take-away bar: make your own hard subtractions

Learning Material  |  Interactive Lesson

Solve subtractions such as 93-47. Use a linear partitioning tool to help solve your own subtractions. Learn strategies to do complex arithmetic in your head. Split a subtraction 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 partition numbers and use a linear model to solve subtractions mentally.
2. Students apply the associative property to solve subtractions 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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