Mathematics, 08.10.2021 01:10, coolsoftball2002

51:15 The model shows the expression 21 + 9.

A model with 3 rows of 7 squares and 3 rows of 3 squares.

Which expression is equivalent to this sum?
3 (7 + 3)
3 (7) + 3
3 + 7 + 3
7 (3 + 3)

Answers: 2

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51:15 The model shows the expression 21 + 9.

A model with 3 rows of 7 squares and 3 ro...