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Lesson details
Key learning points
- In this lesson, we will learn how to subtract 2 digit numbers using number lines to represent our mental calculations.
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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3 Questions
Q1.
Solve the following equation mentally: 18-10=?
0
10
Q2.
Solve the following by using a whole part model and the "Make 10" strategy. 32-15=?
15
22
Q3.
Solve the following equation by using a whole part model and the "Make 10" strategy. 45-16=?
28
35
3 Questions
Q1.
Solve the following equation: 41-14=?
26
37
Q2.
Solve the following equation: 61-25=?
37
51
Q3.
What is the inverse of this equation? 51-25=26
26-25=51
51+26=25