Show:
Adding Rational Numbers
Subtracting Rational Numbers
Multiplying rational Numbers
Adding Subtracting or Multiplying 3 or More
100
Evaluate: 145+55
200
100
Evaluate: 300-120 =
180
100
A negative number multiplied by a negative number (-.-) = a ____ number?
Positive number
100
Evaluate: -20 + 40 - 10
10
200
-20 + (-10) =
-30
200
Evaluate: -12 - 6 -5 =
-23
200
A positive number multiplied by a negative number (+.-) = a _____ number?
Negative number
200
Evaluate: -6-12-2=
-20
300
Evaluate: -10 + 15 =
5
300
Evaluate: 60 - 10 - (-2) =
52
300
Evaluate: 15(-3)
-45 (when multiplying a positive and a negative = a negative)
300
Evaluate: (-3/4) * (-4/7) * (-2/3)
-2/7
400
Evaluate: -16 + 8 + (-2) =
-10
400
Evaluate: -20 - (-10) -5 =
-15
400
Evaluate -10(-22)
220 (when multiplying: a negative and a negative = a positive)
400
What is the easiest to multiply 3 rational numbers especially if the are fractions?
multiply the first 2 factors first.
500
Explain the different ways to add 2 rational numbers and get a negative number. Give examples on the board.
The sum of two negative rational numbers is always negative.The sum of a negative and positive rational number is negative if the value of the negative number is greater than the positive number. Ex: -10 + (-10) = -20 Ex: -30 + 20 = -10
500
Evaluate: -400 - (-600) -2
198
500
Evaluate: -16(160)
- 2,560 (when multiplying: a negative and a positive = a negative)
500
Is the product (multiplication) of three negative numbers a positive or negative number. Explain Why. Use what you know about multiplication rules. NOT YOUR CALCULATOR (Hint it's stated in 3.4 notes)
A negative number. We can find this out if we know that: * multiplying 2 negative numbers is positive. * multiplying a positive & a negative is negative. * So multiplying a 3rd negative number is the same a multiplying a positive & a negative which always equals a negative.