Vertical Subtraction - Word Problems
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LearningTranscript
00:00Hi kids, we all know how to subtract. Today we will practice the vertical subtraction
00:08with bigger numbers. So let's get started. Factory A produced 34,567 ties in a month
00:21and Factory B produced 47,999 ties in a month.
00:30Which factory produced more ties and how many more?
00:35Kids, let's find out the answer. 47,999 is more than 34,567. So Factory B produced more
00:49ties. Now we have to find out how many more. That
00:55means we have to find the difference of ties produced. For that, we will subtract the
01:01smaller number from the bigger number. As we know, we will write the bigger number
01:07first and every digit must be below its place. 9 minus 7 equals 2. Write 2 in difference
01:14at 1's place. 9 minus 6 equals 3. Write 3 in difference at 10's place. 9 minus 5 equals
01:344. Write 4 in difference at 100's place. 7 minus 4 equals 3. Write 3 in difference
01:41at 1000's place. 4 minus 3 equals 1. Write 1 in difference at 10,000's place.
01:55So our answer is 13,432. 13,432 more ties were produced by Factory B.
02:02Now let's take another example. Bakery C sold 34,000 pastries in a month and
02:18Bakery D sold 31,999 pastries in a month. Which bakery sold more pastries and how many
02:25more? Kids, let's answer the question. 34,000 is more than 31,999. So Bakery C sold more
02:44pastries. Now let's find out how many more. For this, we have to find the difference so
02:52subtract the bigger number from smaller number. We can't subtract 9 from 0 so borrow 1 from
03:0210's digit. But 10's digit is 0 so 10's digit will borrow 1 from 100's digit. But
03:12100's digit too is 0 so 100's digit will borrow 1 from 1000's digit. Now let's
03:22solve this problem. Cross 4, make it 3 and give 1 to 0 at 100's place. Now cross 10
03:31at 100's place, make it 9. Give 1 to 0 at 10's place. Now cross 10 at 10's place,
03:43make it 9. Give 1 to 0 at 1's place. Now we have 10 at 1's place, make it 9. Cross
03:529 from 10, we get 1. Write 1 at 1's place in the difference. Now at 10's place, 9 minus
04:059 equals 0. Write 0 at 10's place in the sum. Again at 100's place, 9 minus 9 equals 0.
04:12Write 0 at 100's place. Now at 1000's place, 3 minus 1 equals 2. Write 2 at 1000's place
04:30and at 10,000's place, 3 minus 3 equals 0. Write 0 at 10,000's place. So our answer
04:38is bakery C sold 2,001 more pastries than bakery D. Now let's take another example.
04:53We have to subtract 345 from 1,234. So let's do it the vertical subtraction method. Always
05:01write the bigger number first, then the smaller number. Also each digit must be below its
05:11right place. Now we can subtract 4 from 5. So what do we do here? 4 will borrow 1 from
05:21the digit at 10's place. Cross 3, make it 2, subtract 4 from 5. Now subtract 4 from
05:305 and give 1 to 4 and it becomes 14. 14 minus 5 equals 9. Write 9 in difference at 1's place.
05:45We cannot subtract 2 from 4, so borrow 1 from 100's place. Cross 2, make it 1. Make 2 at
05:5310's place as 12. 12 minus 4 equals 8. Write 8 in difference at 10's place. We can't
06:06subtract 3 from 1, so borrow 1 from 1000's place. Cross 1, make it 0. Make 1 at 100's
06:14place, 11. 11 minus 3 equals 8. Write 8 in difference at 100's place. We got the answer.
06:29889 is our answer. So kids, we now know how to subtract bigger numbers using the vertical
06:36subtraction method. Now you may go ahead and take a quiz to learn more. Bye-bye.