Mental subtraction: 2-step

Introduced in the Year 4 curriculum as: "Solve addition and subtraction two-step problems in contexts, deciding which operations and methods to use and why."

Number line subtraction is a good method to use when subtracting from a number ending in two or more zeroes.


Example 1:

What is 700 - 93?

Answer: 700 - 93 = 607


Example 2: What is 800 - 57?

Answer: 800 - 57 = 743


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