Word problems on addition

Example 1

In a period of three consecutive years, Jackson earned 135 003 600 shillings in the first year, 40 634 000 shillings in the second year, and 123 350 350 shillings in the third year. How much money did he earn in the three years?

Solution

Income in the first year = 135 003 600 shillings

Income in the second year = 40 634 000 shillings

Income in the third year = 123 350 350 shillings

Add them in order to get the total income:

    135 003 600
     40 634 000
+   123 350 350
-------------
    298 987 950

Therefore, Jackson's total income for three years was 298 987 950 shillings.

Example 2

A certain country used 564 145 263 kilograms of sugar in April and 295 243 453 kilograms of sugar in May. How many kilograms of sugar did the country use in the two months?

Solution

Mass of sugar used in April = 564 145 263 kg

Mass of sugar used in May = 295 243 453 kg

To get the number of kilograms of sugar used in the two months, add the mass of sugar used in those months:

    564 145 263
+   295 243 453
-------------
    859 388 716

Therefore, the country used 859 388 716 kilograms of sugar in the two months.

Subtraction of whole numbers arranged horizontally without regrouping

Example

867 787 842 − 436 846 701 =

Steps

1. Subtract ones: 2 – 1 = 1. Write 1 in the ones place.	867 787 842 − 436 846 701 = _________1
2. Subtract tens: 4 – 0 = 4. Write 4 in the tens place.	867 787 842 − 436 846 701 = ________41
3. Subtract hundreds: 8 – 7 = 1. Write 1 in the hundreds place.	867 787 842 − 436 846 701 = ______141
4. Subtract thousands: 7 – 6 = 1. Write 1 in the thousands place.	867 787 842 − 436 846 701 = _____1141
5. Subtract ten thousands: 7 – 4 = 3. Write 3 in the ten thousands place.	867 787 842 − 436 846 701 = ____31141
6. Subtract hundred thousands: 8 – 8 = 0. Write 0 in the hundred thousands place.	867 787 842 − 436 846 701 = ___031141
7. Subtract millions: 7 – 6 = 1. Write 1 in the millions place.	867 787 842 − 436 846 701 = __1031141
8. Subtract ten millions: 6 – 3 = 3. Write 3 in the ten millions place.	867 787 842 − 436 846 701 = _31031141
9. Subtract hundred millions: 8 – 4 = 4. Write 4 in the hundred millions place.	867 787 842 − 436 846 701 = 430941141

Therefore, 867 787 842 − 436 846 701 = 430 941 141.