Sand Reckoning
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- Study the number line and the number sentences below. Do you agree that each number sentence represents how the hopper moved? Why or why not?
- 42,300,000 = 10,000,000 + 10,000,000 + 10,000,000 + 10,000,000 + 1,000,000 + 1,000,000 + 100,000 + 100,000 + 100,000
- 42,300,000 = 40,000,000 + 2,000,000 + 300,000
- 42,300,000 = 4 10,000,000 + 2 1,000,000 + 3 100,000
The number sentence below is a true statement since the amount on one side of the equal sign has the same value as the amount on the other side.
The number sentence can also be called an equation because the answers on both sides are equal.
