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Adding Equal Groups
A 3 by 4 array has 3 rows of 4. You can count by adding: 4 + 4 + 4 = 12. This is called repeated addition — adding the same number over and over. Each row is one group.
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Mathematics — Arrays and Early Multiplication
A 3 by 4 array has 3 rows of 4. You can count by adding: 4 + 4 + 4 = 12. This is called repeated addition — adding the same number over and over. Each row is one group.