8.9463 rounded off to one decimal place digit. So, decider is 4, which is less than 5. Thus, 8.9463 will be rounded off to 8.9.  Now, 8.9 + 9.1 = 18.0

In number 12.756, digit at tenths place is 7. Thus, decider is 5, which is equal to 5. So, 12.756 rounded off to tenth place is 12.8. 0.24 rounded off to the nearest tenth place is 0.2. (because 4 is decider, which is less than 5) Now, 12.8 + 0.2 = 13.0

765.362 rounded off to nearest thousand is 1000. 765.362 rounded off to nearest ten is 770. Sum of both the rounded numbers = 1000 + 770 = 1770.

In number 112, digit at tens place is 1 and decider is 2, which is less than 5. Thus, 112 rounded off to the nearest tens is 110. In number 616, digit at tens place is 1 and decider is 6, which is greater than 5. Thus, 616 rounded off to the nearest ten is 620. Sum of both the numbers = 110 + 620 = 730

In 15.87 rounded off to nearest whole number is 16.

In number 754300, digit at hundred thousand is 7 and decider is 5 which is equal to 5. Thus, 754300 rounded off to nearest hundred thousand is 800000.

In number 765.3682, digit at thousandth place is 8 and decider is 2, which is less than 5. Thus, 765.3682 rounded off to nearest thousandth is 765.368.

1375 rounded off to nearest ten = 1380. 888 rounded off to nearest ten = 890. Difference of both rounded off numbers = 1380 - 890 = 490. Difference of actual numbers = 1375 - 888 = 487. Difference of values = 490 - 487 = 3.

In number 929689, digit at hundred thousand is 9 and decider is 2, which is less than 5. Thus, 929689 rounded off to the nearest hundred thousand is 900000.

In 2672, digit at tens place is 7 and decider is 2, which is less than 5. Thus, 2672 rounded off to the nearest ten is 2670.

In 2753, digit at hundreds place is 7 and decider is 5, which is equal to 5. Thus, 2753 rounded off to the nearest hundred is 2800. So, 2800 x 10 = 28000

In 97, digit at tens place is 9 and decider is 7, which is greater than 5. Thus, 97 rounded off to the nearest ten is 100.

In 5048, digit at hundred place is 0 and decider is 4, which is less than 5. Thus, 5048 rounded off to the nearest hundred is 5000. Now, 5000 x 90 = 450000

In 23.987, digit at hundredth place is 8 and decider is 7, which is greater than 5. Thus, 23.987 rounded off to the nearest hundredth is 23.99.

In 89.43, digit at tenth place is 4 and decider is 3, which is less than 5. Thus, 89.43 rounded off to the nearest tenth is 89.4.

In 3.7096, digit at hundredth place is 0 and decider is 9, which is greater than 5. Thus, 3.7096 rounded off to the nearest hundredth is 3.71.

Number is rounded upwards.

In number 765.3682, decider is 3 which is less than 5. Thus, 765.3682 rounded off to nearest whole number 765.

7.6178 m = 7617.8 mm. 7617.8 rounded off to nearest whole number is 7618. (Because 8 is decider which is greater then 5).

In 222678, digit at hundred thousand is 2 and decider is 2 which is less than 5. Thus, 222678 rounded off to hundred thousand is 200000.

In 145302, digit at ten thousand place is 4 and decider is 5 which is equal to 5. Thus, 145302 rounded off to nearest ten thousand is 150000.

In 13.232, digit at hundredth place is 3 and decider is 2, which is less than 5. So, 13.232 rounded off to the nearest hundredth is 13.23. In 99.689, digit at tenth place is 6 and decider is 8, which is greater than 5. So, 99.689 rounded off to the nearest tenth is 99.7. Sum of rounded numbers = 13.23 + 99.7 = 112.93

In 9520, digit at thousand place is 9 and decider is 5, which is equal to 5. Thus, 9520 rounded off to the nearest thousand is 10000. 10000 x 3 = 30000

In 555, digit at hundredth place is zero and decider is zero, which is less than 5. Thus, 555 rounded off to the nearest hundredth is 555.00.

7.6178 m = 761.78 cm 761.78 rounded off to the nearest whole number is 762. (Because 7 is the decider, which is greater then 5)

In 4.16, digit at tenth place is 1 and decider is also 6, which is more than 5. So, 4.16 rounded off to the nearest tenth is 4.2.

In 0.99989, digit at thousandth place is 9 and decider is 8, which is greater than 5. Thus, 0.99989 rounded off to the nearest thousandth is 1.000.

In 8947, digit at tens place is 0 and decider is also 0, which is less than 5. So, 8947 rounded off to the nearest ten is 8950. Now, 8950 + 4.0 = 8954.0

13.09 = 13 (Because 0 is a decider, which is less than 5.)

In 755.300, digit at hundredth place is 0 and decider is also zero, which is less than 5. So, 755.300 rounded off to the nearest hundredth place is 755.30