Express the following to a. 1d.p, b. 2d.p, c. 3d.p. A. 9.23564 B. 12.1464 C. 0.014500081 D. 0.92453 E. 296.0632 2. Find 0.557 x 83.12 to 2d.p 3. A contractor used 0.55...

Here are the solutions to the problems:

1. Express the following to a. 1 d.p. b. 2 d.p. c. 3 d.p.

• A. 9.23564

  • 1 d.p.: The second decimal digit is 3, so we round down. $$9.2$$
  • 2 d.p.: The third decimal digit is 5, so we round up. $$9.24$$
  • 3 d.p.: The fourth decimal digit is 6, so we round up. $$9.236$$

• B. 12.1464

  • 1 d.p.: The second decimal digit is 4, so we round down. $$12.1$$
  • 2 d.p.: The third decimal digit is 6, so we round up. $$12.15$$
  • 3 d.p.: The fourth decimal digit is 4, so we round down. $$12.146$$

• C. 0.014500081

  • 1 d.p.: The second decimal digit is 0, so we round down. $$0.0$$
  • 2 d.p.: The third decimal digit is 1, so we round down. $$0.01$$
  • 3 d.p.: The fourth decimal digit is 5, so we round up. $$0.015$$

• D. 0.92453

  • 1 d.p.: The second decimal digit is 2, so we round down. $$0.9$$
  • 2 d.p.: The third decimal digit is 4, so we round down. $$0.92$$
  • 3 d.p.: The fourth decimal digit is 5, so we round up. $$0.925$$

• E. 296.0632

  • 1 d.p.: The second decimal digit is 6, so we round up. $$296.1$$
  • 2 d.p.: The third decimal digit is 3, so we round down. $$296.06$$
  • 3 d.p.: The fourth decimal digit is 2, so we round down. $$296.063$$

2. Find $0.557 \times 83.121$ to 2 d.p.