Cross Check Answers After Adding Or Subtracting
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LearningTranscript
00:00Hi kids! Today we will be learning how you can check your answers on your own.
00:09So let's get started.
00:13Here is an addition problem.
00:18Here 40 and 50 are our addends.
00:24Solving this, we get the sum.
00:28It's 90.
00:31Now, how to check whether the answer 90 is correct or not?
00:38You have to subtract any one of the addend from the sum.
00:45And if you get the other addend, the sum is correct.
00:52Let's see.
00:5490 minus 40 equals 50.
01:01Subtracting one of the addend from the sum, we get the other addend.
01:08So it proves our answer is correct.
01:13Now, let's take another example.
01:18We saw 45 plus 78 is 123.
01:26Now, how can we check this answer?
01:32We have to subtract any one of the addend from the sum.
01:38And if we get the other addend, our answer is correct.
01:45So, let's subtract 78 from 123.
01:52We get 45.
01:56And 45 is the other addend.
02:02So this proves that the sum was correct.
02:07So we have learned to check the addition problems.
02:13We subtract one of the addend from the sum.
02:18And if we get the other addend, our sum is correct.
02:25Now, let's move on to learn checking our subtraction problems.
02:34Here is a subtraction problem.
02:38First of all, 65 is the minuet, that is the number from which we subtract.
02:4910 is the subtrahend, that is the number that is to be subtracted.
02:58And 55 is the difference between the minuet and the subtrahend.
03:07Now, to check whether the difference is correct, add the subtrahend to the difference.
03:16And if you get the minuet, your answer is correct.
03:22I repeat, to check whether the difference is correct, add the subtrahend to the difference.
03:32And if you get the minuet, your answer is correct.
03:38In simple words, add the number you are subtracting to the difference.
03:45And if you get the number from which you were subtracting, your answer is correct.
03:53Let's take another example.
03:5890 minus 35 is 55.
04:05We have to check whether this is correct or not.
04:11Add the subtrahend to the difference.
04:15We get 90.
04:18And 90 is our minuet.
04:22So, our answer is correct.
04:27Let's take one more example.
04:32Here is a subtraction problem done.
04:37Let's check it.
04:40Add the subtrahend to the difference.
04:45We got 76, which is the minuet.
04:51So, it's correct.
04:54So, kids, what have we learned?
04:58We have learned to check the addition problems we use subtraction.
05:05Subtracting one addend from the sum.
05:10If we get the other addend, our sum is correct.
05:15And to check the subtraction problem, use addition.
05:23Adding subtrahend to the difference.
05:27If we get the minuet, our answer is correct.
05:33So, kids, you can now check your own answers.
05:38Now you may go ahead and take a quiz to learn more.
05:42Bye-bye.