Читать книгу Foundations of Chemistry - Philippa B. Cranwell - Страница 39

Calculate the answers to the following expressions, and present your result in scientific notation:

1 7.5 × 5.7 =

2 (6.4 × 102) × (1.30 × 104) =

3 (1.751 × 10−3) × (59.0 × 10−2) =

4 1.435 × 10−2 ÷ 2.9 × 10−4 =