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Fast Addition Reverse
Just like Fast Addition, but does the math facts in reverse. Research suggests that learning 9s, then 8s, then 7s, and so on may be more efficient than learning 1s, then 2s, then 3s, and so on. The reason is that you'll reinforce learning of the hardest materials from start until end.
This topic aligns to the following state standards
Grade 1: 1. Use one-digit addition and subtraction to solve real-world and mathematical problems.
Grade 2: 1. Use one- and two-digit addition and subtraction to solve real-world and mathematical problems.
Grade 3: 4. Demonstrate mastery of basic addition facts for addends 0 through 9, without a calculator.
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