Math Playground for Teachers
Do you know subtraction facts through 12? Can you subtract numbers in your head?
Practice this important skill and move your sailboat to
Sailboat Subtraction - Learning Connections
Mental Math - fast recall of subtraction facts
Problem Solving - match mathematical expressions with the correct value
Common Core Connection for Grades 1 and 2
Understand subtraction as an unknown-addend problem.
Apply properties of operations as strategies to subtract.
Subtract within 20.
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