Question

Calculate the difference between the largest and the smallest decimals represented in the following diagram.

• A. 23.11
• B. 22.11
• C. 21.11
• D. 20.11

Answer 1

The correct option is D 20.11

The models are represented according to the following rule:


So, expressing the given models as decimals, we get:


The ascending order of the decimals is 1.12 < 1.56 < 12.43 < 21.23.

Hence,
The largest decimal = A = 21.23
The smallest decimal = D = 1.12

Now, to calculate the difference between the largest decimal and the smallest decimal, we calculate the value of A - D.

Calculating A - D using models, we get:


The final representation of A - D contains 2 cubes, 0 flats, 1 rod, and 1 block.

So, the value of A - D is 20.11.

∴ The difference between the largest and the smallest decimals in the given representation is 20.11.