Question

Rohan used the model below to show three groups of cubes 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.

a) Rohan correctly represented the model.
b) Rohan should have used 5 groups of tens.
c) Rohan should have used 2 groups of tens.
d) Rohan should have used 3 groups of tens, and there is no error.

Answer 1

Rohan's model of three groups with 4 groups of tens and 3 ones each was correct. The appropriate representation should have 3 groups of tens, confirming that his model has no error.

Step-by-step explanation:

Rohan made an error in his model when he represented three groups of cubes with 4 groups of tens and 3 ones in each group. The correct answer is actually option d) Rohan should have used 3 groups of tens, and there is no error. This is because each group should represent the quantity mentioned, so three groups of tens means exactly 30 in each group, which matches Rohan's description.