Answer:
Joy's multiplication problem is 4 times 23. If she made a mistake in her calculation, she can check her work using an addition expression. Because multiplication is repeated addition, the equivalent addition expression to "4 times 23" would be "23 + 23 + 23 + 23". She could add up these four 23s to check her multiplication.
The correct answer to the multiplication problem "4 times 23" is 92, not 82. Joy can verify this by adding 23 four times:
23 + 23 = 46
46 + 23 = 69
69 + 23 = 92
So, her addition check would also result in 92, confirming that the correct answer to the multiplication problem is indeed 92, not 82.