Question

Rohan used the model below to show 1.38÷3 .

Three groups of cubes are shown with 4 groups of tens and 3 ones in each group.

Part A
Rohan made an error in his model. Explain his error. Include the correct grouping for the model.

Answer 1

Rohan's error in his model is that he grouped the ones incorrectly. He should have grouped them into three separate groups of ones instead of combining them into one group of threes.

The correct grouping for the model should be three groups of cubes with 4 groups of tens and 3 ones in each group.