# Solving problems with rational numbers in decimal form

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##### Examples
###### Lessons
1. Estimate and calculate
1. -2.42 + (-6.53)
2. -0.37 - (-4.61)
3. 7.36 - 3.41
4. 1.47 + (-5.92)
2. Estimate and calculate.
1. -4.75 ÷ 1.9
2. 2.5 × (-6.4)
3. -8.6 ÷ (-1.3)
4. -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:
1. the change in temperature.
2. average rate of change in temperature.
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##### Practice
###### Topic Notes
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.