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Grade 4 - Mathematics
1.18 Subtraction with Regrouping
Method:
Start subtracting from the ones place.
If the subtrahend is lesser than minuend in ones place then we borrow 1 from tens place.
If the subtrahend is lesser than minuend in tens place then we borrow 1 from hundreds place
Example
:
Subtraction with regrouping:
Start from the ones place, 4 is lesser than 6. So 1 is borrowed from 2 and 4 becomes 14.
In tens place, 2 becomes 1, now again 1 is less than 5, so 1 is borrowed from 8 and 1 becomes 11.
In ones place 4 is subtracted from 7.
Answer: 368
Subtracting across zeros:
When there is a zero it is always made 10 by borrrowing 1 from digits in higher place values.
In ones place 4 is made 14 and zero is made 9 (since 1 is borrowed from 10 to make 14)
In hundreds place 3 becomes 2.
Answer: 117
Directions:
Subtract the following numbers. Also write at least ten examples of your own.
Q 1
: 402 - 164 =
Answer:
Q 2
: 809 - 528 =
Answer:
Q 3
: 6,005 - 246 =
Answer:
Q 4
: 4,602 - 2,537 =
Answer:
Q 5
: $6.00 - $5.25 =
Answer:
Q 6
: 800 - 764 =
Answer:
Q 7
: $20.00 - $16.48 =
Answer:
Q 8
: 2,308 - 924 =
Answer:
Question 9: This question is available to subscribers only!
Question 10: This question is available to subscribers only!
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