estimate the sum or difference by rounding off each number to its greatest place value: 12370 + 11110
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Answer:
⇒ The given two numbers are 5679 and 422.
⇒ In number 5679, its tens digit is 7, which is greater than 5.
⇒ So, we increase the digits at hundreds place by 1 and replace each one of the digits at tens and ones place by 0 to round off the given number to its greatest place.
∴ Round off 5679 to its greatest place is 5700
⇒ In number 422, its Itens digit is 2, which is less than 5.
⇒ So, we replace each of the tens and ones digits by 0 and keep the other digits as they are to round off the given number to its greatest.
∴ Round off 422 to its greatest place is 400
∴ Required number = 5700−400=5300