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This set is a great way for students to practice adding 10 more and subtracting 10 less from numbers on a hundreds chart for numbers up to 100. This set is also included in my Math Around the Room Bundle .
For your convenience, both black and white and color cards have been included.
Included in this set:
Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.