Yellow counters are +1 and red counters are −1; a yellow and a red counter together make a zero pair. How many zero pairs can be made in the tray, and what number does the tray show?

Question

Accepted Answer

7 zero pairs; −4. There are 7 yellow and 11 red counters. Each yellow pairs with one red: 7 zero pairs. Left over: 4 red, so the tray shows 7 + (-11) = -4.

Yellow counters are +1 and red counters are −1; a yellow and a red counter together make a zero pair. How many zero pairs can be made in the tray, and what number does the tray show?

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