CALCULATE SCIENTIFIC NOTATION (Add and Subtract)

1) 9 × 103 + 2.3 × 104



2) 15 × 102 + 5.2 × 105





3) 10 × 104 + 2.8 × 106





4) 7.0 × 103 + 8.6 × 104





5) 3.0 × 104 + 14.5 × 105





6) 8 x 104 – 2.7 x 102





7) 5.0 x 103 – 8.9 x 104





8) 7.0 x 103 – 8.20 x 102