Sonja is learning how to use more efficient strategies for multiplication. She learned about adding or subtracting a group, doubling, and near squares.
She used the adding-a-group strategy to solve 6 x 7 = ?. She explained:
"I will use the helper fact 5 x 7. I know that 5 x 7 = 35. I can add one more group of 7 to 35 to get 42. I now have 6 groups of 7, so I know 6 x 7 = 42.
Use a picture to show how Sonja solved the problem.
Explain how your picture matches Sonja's explanation.
Use words to show how you solved the problem.
Choose at least one other efficient multiplation strategy, such as doubling or near square, to solve 6 x 7 = ?. Use pictures to show how you solved the problem.