M.1.6.e: Creating equivalent but easier or known sums (e.g., adding 6 +7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).

Creating equivalent but easier or known sums (e.g., adding 6 +7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).

Khan Academy Resources
Add within 20Subtract within 20Subtract within 20 visuallyAdd & subtract within 20Add within 20 visuallyAdding within 20 using place value blocksAdding within 20 using ten frames
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