This chapter repeats many of the objectives of Chapter 1, but in relation to decimal numbers. In addition to computations with decimal numbers, the chapter covers comparing, rounding, and estimating. Scientific notation is introduced, and students learn how to convert between whole numbers and scientific notation and perform computations of numbers in scientific notation.

What you can expect to learn

After completing these activities you should be able to

  1. Convert between standard, word, and expanded forms of decimal numbers.
  2. Compare and order decimal numbers and to round decimal numbers to a designated place value.
  3. Add and subtract decimal numbers.
  4. Multiply decimal numbers.
  5. Divide decimal numbers and round the quotient to a designated place value.
  6. Estimate sums, differences, products, and quotients of decimal numbers using various techniques.
  7. Find two whole numbers that a square root lies between and to estimate square roots that are not whole numbers.
  8. Multiply and divide by powers of ten, and be able to convert between whole numbers and scientific notation.
  9. Add, subtract, and multiply numbers in scientific notation.
Activity List