IM: 6.4.4: How Many Groups? (Part 1) (Lesson)
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4.1: Equal-sized Groups
4.2: Reasoning with Pattern Blocks
Write a multiplication equation and a division equation for each sentence or diagram.
Eight $5 bills are worth $40.
There are 9 thirds in 3 ones.

Use the pattern blocks in the applet to answer the questions. (If you need help aligning the pieces, you can turn on the grid.)
https://curriculum.illustrativemathematics.org/MS/students/1/4/4/index.html
[Scroll to the tool under "4.2: Reasoning with Pattern Blocks"]
Here are Elena’s diagrams for

Use (or draw) pattern blocks to represent each multiplication equation. Remember that a hexagon represents 1 whole.
a.
b.