Add and Subtract: Mental Math Challenge

Features

• -Step by step instructions for easy mental addition and subtraction.
• -Separate lessons for 2 digit, 3 digit and 4 digit number operations.
• -Very interesting and easy to remember math tricks.
• -Challenging tests that have levels and achievements for motivation.
• -Each test has 3 levels with increasing difficulty.
• -Will be very useful for kids going for oral math quizzes
• -Will increase number sense in kids

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