Add: 2 . 203 × 10 27 + 3 . 312 × 10 24

The given expression is 2 . 203 × 10 27 + 3 . 312 × 10 24 = 2203 × 10 - 3 × 10 27 + 3 . 312 × 10 24 = 2203 × 10 24 + 3 . 312 × 10 24 = 2203 + 3 . 312 × 10 24 = 2206 . 312 × 10 24 Hence, the required answer is 2206 . 312 × 10 24 .

Subtract: 1 . 002 × 10 9 - 2 . 34 × 10 7

The given expression is 1 . 002 × 10 9 - 2 . 34 × 10 7 = 100 . 2 × 10 - 2 × 10 9 - 2 . 34 × 10 7 = 100 . 2 × 10 7 - 2 . 34 × 10 7 = 100 . 2 - 2 . 34 × 10 7 = 97 . 86 × 10 7 Hence, the required answer is 97 . 86 × 10 7 .

Simplify: 7 × 10 - 4 + 6 × 10 - 5 + 2 . 6 × 10 - 5 10 - 3 + 2 × 10 - 4 + 1 . 1 × 10 - 4

The given expression: 7 × 10 - 4 + 6 × 10 - 5 + 2 . 6 × 10 - 5 10 - 3 + 2 × 10 - 4 + 1 . 1 × 10 - 4 = 7 × 10 - 4 + 0 . 6 × 10 × 10 - 5 + 0 . 26 × 10 × 10 - 5 10 × 10 - 1 × 10 - 3 + 2 × 10 - 4 + 1 . 1 × 10 - 4 = 7 × 10 - 4 + 0 . 6 × 10 - 4 + 0 . 26 × 10 - 4 10 × 10 - 4 + 2 × 10 - 4 + 1 . 1 × 10 - 4 = 7 + 0 . 6 + 0 . 26 × 10 - 4 10 + 2 + 1 . 1 × 10 - 4 = 7 . 86 13 . 1 = 7 . 86 13 . 1 × 100 100 = 786 1310 = 131 × 6 131 × 10 = 6 10 = 3 5 Hence, the required answer is 3 5 .