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Cool Math

Coolmath: Coolmath4kids: Orbit Integers

For Students 6th - 8th
Add positive and negative numbers in this multiplayer space race!
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National Council of Teachers of Mathematics

Nctm: Illuminations: Volt Meter

For Students 3rd - 8th Standards
As you put the different type of batteries on the volt meter pay attention to the voltage equations in the table. See how positive and negative numbers interact.

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