I solved this problem : 33 + 45 + 78 how could i check my answer?
2 answers:
You can check the answer by: adding the numbers together, then add only 2 of the numbers together and subtract the sum of the 2 numbers that you added, from the sum of all of the numbers. for the answer, you should get the number that you left out.
Step-by-step explanation:
So the answer for 33+45+78 is 156.
If you want to check that, you can use inverse operations, so subtract.
156-78=78. (Check 78)
78-45=33 (Check 45 and 33)
Well, now it's checked because we used all the factors of the equation!
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