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Question

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


A
23.11
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B
22.11
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C
21.11
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D
20.11
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Solution

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.

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