Solving problems with rational numbers in decimal form

Solving problems with rational numbers in decimal form

In this lesson, we will learn how to work with rational numbers in decimal form. We will look at questions on adding, subtracting, multiplying, and dividing rational numbers.

Lessons

  • 1.
    Estimate and calculate
    a)
    -2.42 + (-6.53)

    b)
    -0.37 - (-4.61)

    c)
    7.36 - 3.41

    d)
    1.47 + (-5.92)


  • 2.
    Estimate and calculate.
    a)
    -4.75 ÷ 1.9

    b)
    2.5 × (-6.4)

    c)
    -8.6 ÷ (-1.3)

    d)
    -3.3 × (-3.3)


  • 3.
    In a winter day, the temperature at 9:00 a. m. is -5.7 °C and 3.8 °C at 2:00 p.m. Find:
    a)
    the change in temperature.

    b)
    average rate of change in temperature.