lesson
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Have you ever played on a see-saw with a friend?
When you both weigh the same, the see-saw stays flat and balanced in the air.
📊Interactive diagram
Can math numbers balance just like a see-saw?
The Equal Sign
The equal sign (=) tells us that both sides have the same value.
📊Interactive diagram
What happens if we put two smaller groups together on one side?
Adding on the Scale
On the left, we have 3 red blocks and 2 blue blocks. On the right, we have 5 yellow blocks.
📊Interactive diagram
Because 3+2 makes 5, both sides have the same amount, so the scale stays level!
Can we have addition on both sides of the equal sign?