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Home > MC2 > Chapter 5 > Lesson 5.1.3 > Problem 5-38


Remember to line up the decimal points when adding or subtracting numbers with decimals.


Find a common denominator.

See part (b).

When you multiply numbers with decimals, you do not necessarily have to line up the decimal points.


When you subtract a negative, you add its opposite.

Multiply the numerators together and the denominators together.

Remember, a negative number multiplied by a positive number is always a negative number.