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Adding 8 and 9 Using Strategies by api-336080613 is a document available to read on EtoBox.

We are learning to use the friendly and fix strategy to add 8 and 9 to a number. This involves 3 steps: 1) make the second number friendly by adding or subtracting 1, 2) solve the new number sentence, 3) fix the answer by doing the opposite adjustment made in step 1. Some examples shown are 67+9=76 by making 9 into 10, then subtracting 1 from the answer.

Author

api-336080613

Language

EN