Adding Rational Numbers
When I am multiplying or dividing fractions, I need a common denominator?
FALSE!
you only need common denominators when add or subtracting!
When you are adding or subtracting decimals, you must line up the decimal point.
TRUE!
When multiplying, you do the calculation like you would with whole numbers and then you adjust the decimal point.
11/4+(-5/3)
What is
13/12
or
1 1/12?
?
When multiplying or dividing fractions, you should rewrite any mixed numbers as improper fractions.
True!
(-1/3)(3/4)(3/5)
What is (-3/20)?
When adding or subtracting values and the signs are the same, the answer will be negative.
False!
Subtract the 2 values and the sign will be the sign of the bigger value.
-45/4 + (-21/2)
What is -87/4 or -21 3/4?
-6 1/4 - (-12 1/2)
What is 0?
(-5/2)(7/6)(-8/3)
What is 70/9 or 7 7/9?
When multiplying or dividing values with same signs, the value will be positive.
True!
neg * neg = positive
pos * pos = positive