We can also use the graph sheet to model numbers. We can first initialize a perfect square, say \((1 cm \times 1 cm)\), and give it the value we gave to the cube (100,000) in the multi-base block.

Watch the lesson below and try your hands on the exercises that follow.

Examples

Example 1

Using a graph sheet, model the number 4,200,000.

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Solution

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Example 2

Using a graph sheet, model the number 13,300,000.

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Solution

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Key Concepts

\( \begin{eqnarray*} 1 \ rod & = & 10 \times 1 \ cm^2 \\ 1 \ rod & = & 10 \ cm^2 \\[0.5em] 1 \ flat & = & 10 \times 1 \ rod \\ 1 \ flat & = & 10 \times 10 \ cm^2 \\ 1 \ flat & = & 100 \ cm^2 \\[0.5em] 1 \ block & = & 10 \times 1 \ flat \\ 1 \ block & = & 10 \times 100 \ cm^2 \\ 1 \ block & = & 1,000 \ cm^2 \\ \end{eqnarray*} \)

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Using the graph sheet \((1 \ cm^2 = 100,000)\) model the following numbers.

1. 6,000,000
2. 42,500,000
3. 7,900,000
4. 800,000
5. 91,000,000
6. 1,500,000
7. 200,000
8. 60,400,000
9. 5,000,000
10. 87,000,000

Test yourself on what you have learnt so far. Improve on your speed in solving questions.

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