General Rules
Complete the statement:
When multiplying or dividing two numbers with the same sign (positive positive OR negative negative), the result is ___________.
(+) or positive
True or False?
When multiplying decimals, you need to line up the decimals.
False! Only when adding and subtracting!
-5 ÷ 1.5
-3.3
(9/10)(-8/3)
(You may simplify your answer if possible, but do not need to do it for points)
-72/30 OR -12/5
-1 5/6 ÷ 4 1/6
Hint: You need to change the mixed numbers to improper fractions BEFORE dividing.
-11/25
Complete the statement:
When multiplying or dividing two numbers with different signs (positive negative OR negative positive), the result is ___________.
(-) or negative
-9.4 x (-4.7)
44.18
6.4 ÷ (-3.2)
-2
5/8 x (-4/15)
-1/6
-4/11 ÷ 2/7
-1 3/11 or -14/11
Tell whether the expression will have a positive or negative product without multiplying.
-3/10 x (-8/15)
positive
-4.4 x (-6.02)
26.488
.12 ÷ .03
4
(3/8)(-8/5)
You may simplify your answer if possible
-24/40 OR -3/5
9/10 ÷ (-6/5)
-3/4
Tell whether the expression will have a positive or negative quotient without dividing.
(-5)/(4)
negative
-7.2 x 0.1 x (-100)
72
-15.4 ÷ (-2.5)
6.16
(5/7) x (-6/9)
Your answer MUST be in simplest form to receive points
-10/21
What is the rule for dividing by a fractions?
Keep (keep the first number the same)
Change (change the operation from division to multiplication)
Flip (flip the second number/fraction and then multiply like normal)
Tell whether the expression will have a positive or negative product without evaluating.
(-6/5)(-1/2)(-6.3)(-0.6)(-2/3)(7/8)(-100)
positive
-6 x (-0.05) x (-0.4)
-0.12
32.436 ÷ (-4.24)
-7.65
-3/5 x (2 2/7) x (-3 3/4)
Hint: You need to change the mixed numbers to improper fractions BEFORE multiplying.
5 1/7 or 36/7
-4 1/6 ÷ 1 1/3
Hint: You need to change the mixed numbers to improper fractions BEFORE dividing.
-3 1/8 or -25/8