Mathematics
Estimate the following quotients by rounding off each number to its nearest tens:
(i) 423 ÷ 29
(ii) 777 ÷ 27
Answer
(i) 423 ÷ 29
Rounding off 423 to its nearest tens: ones digit is 3 (< 5), so 423 → 420.
Rounding off 29 to its nearest tens: ones digit is 9 (≥ 5), so 29 → 30.
Estimated quotient = 420 ÷ 30 = 14.
Hence, the estimated quotient = 14.
(ii) 777 ÷ 27
Rounding off 777 to its nearest tens: ones digit is 7 (≥ 5), so 777 → 780.
Rounding off 27 to its nearest tens: ones digit is 7 (≥ 5), so 27 → 30.
Estimated quotient = 780 ÷ 30 = 26.
Hence, the estimated quotient = 26.
Related Questions
Estimate the following products by rounding off each of its factors nearest to its greatest place:
(i) 578 × 161
(ii) 9650 × 27
Estimate the following products by rounding off each of its factors nearest to its hundreds:
(i) 5281 × 3491
(ii) 1387 × 888
Estimate the following quotients by rounding off each number to its nearest hundreds:
(i) 2472 ÷ 493
(ii) 7459 ÷ 286
Fill in the blanks:
(i) The digit … has the highest place value in the number 2309
(ii) The digit … has the highest face value in the number 2039
(iii) The digit … has the lowest place value in the number 2039
(iv) Both Indian and International systems of numeration have … period in common.
(v) In the International system of numeration, commas are placed from … after every … digits.
(vi) The bigger number from the numbers 57,631 and 57,361 is ….
(vii) 1 crore = … million
(viii) The smallest 4-digit number with 3 different digits is …
(ix) The greatest 4-digit number with 3 different digits is …
(x) 15 km 300 m = …. m
(xi) 7850 cm = … m … cm
(xii) The number 5079 when estimated to the nearest hundreds is …