Basic Operations with Numbers up to Seven Digits

Addition within 1 000 000

Example 1: 1 450 883 + 393 415 + 98 430 =

Solution :  1 450 883

                    393 415

             +      98  430  

                 1 942 728      

Subtraction within 1 000 000

Example 2 : 8 463 425 – 5 128 390 =

Solution :  8 463 425

            – 5 128 390  

                 3 335 035

Multiplication within 1000 000

Example 3 : 73 093 × 25 =

Solution : 73  093

            ×           25

             1 827  325

Division within 1 000 000

Example 4 : 3 692 104 ÷ 7 =

Solution: 

Solve Problems Involving Basic Operations

Example 5 : The incomplete table shows the number of calculators produced by a factory in three years.

The total number of calculators produced by the factory was 147 536. Find the number of calculators produced in the year 2008.

Solution :

30 142 calculators were produced in the year 2006.

68 200 calculators were produced in the year 2007.

Total number of calculators produced in the three years was 147 536.

147 536 - 30 142 - 68 200

= 117 394 - 68 200

= 49 194

The number of calculators produced in the year 2008 was 49 194.