Find the approximate sum to the nearest thousand :

(i) (43,728 + 36,275)

(ii) (37,804 + 22,475)

(iii) (6,785 + 2,476)

(i) (43,728 + 36,275)

Round 43,728 to the nearest thousand: The hundreds digit is 7, so it rounds up to 44,000.

Round 36,275 to the nearest thousand: The hundreds digit is 2, so it rounds down to 36,000.

Approximate sum: 44,000 + 36,000 = 80,000

Hence, the approximate sum = 80,000.

(ii) (37,804 + 22,475)

Round 37,804 to the nearest thousand: The hundreds digit is 8, so it rounds up to 38,000.

Round 22,475 to the nearest thousand: The hundreds digit is 4, so it rounds down to 22,000.

Approximate sum: 38,000 + 22,000 = 60,000

Hence, the approximate sum = 60,000.

(iii) (6,785 + 2,476)

Round 6,785 to the nearest thousand: The hundreds digit is 7, so it rounds up to 7,000.

Round 2,476 to the nearest thousand: The hundreds digit is 4, so it rounds down to 2,000.

Approximate sum: 7,000 + 2,000 = 9,000

Hence, the approximate sum = 9,000.