Lesson Playlist: Subtracting by Counting Back: Numbers up to 20 Mathematics • Second Year of Primary School
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Finding the Output of Subtraction Machines Testing Numbers up to 20
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Relating Counting to Addition and Subtraction
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Relating Counting Back to Subtraction Problems
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Subtracting Two Numbers up to 99
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Using the Counting Back Strategy to Subtract from Numbers up to 20
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Subtracting a One-Digit Number from a Two-Digit Number