There are two ways to do this. Way 1: Since 5.4 × 107 = 0.054 × 109, we can rewrite the original problem as (0.054 × 109) + (3.23 × 109) which is 3.284 × 109. Way 2: Since 3.23 × 109 = 323 × 107, we can rewrite the original problem as (5.4 × 107) + (323 × 107). This simplifies to 328.4 × 107, which in scientific notation is 3.284 × 109. | 
Calculator