Show:
General Rules
Multiplying Decimals
Dividing Decimals
Multiplying Fractions
Dividing Fractions
100

Complete the statement:

When multiplying or dividing two numbers with the same sign (positive positive OR negative negative), the result is ___________.

(+) or positive

100

True or False?

When multiplying decimals, you need to line up the decimals.

False! Only when adding and subtracting!

100

-5 ÷ 1.5

-3.3

100

(3 9/10)(-8/3)

Hint: You need to change the mixed number to an improper fraction BEFORE multiplying.


-10 2/5    or    -52/5

100

-1 5/6 ÷ 4 1/6

Hint: You need to change the mixed numbers to improper fractions BEFORE dividing.

-11/25

200

Complete the statement:

When multiplying or dividing two numbers with different signs (positive negative OR negative positive), the result is ___________.

(-) or negative

200

-9.4 x (-4.7)

44.18

200

6.4 ÷ (-3.2)

-2

200

5/8 x (-4/15)

-1/6

200

-4/11 ÷ 2/7

-1 3/11     or     -14/11

300

Tell whether the expression will have a positive or negative product without multiplying.

-3/10 x (-8/15)

positive

300

-4.4 x (-6.02)

26.488

300

-15.4 ÷ (-2.5)

6.16

300

(-2 3/8)(-8/5)

Hint: You need to change the mixed number to an improper fraction BEFORE multiplying.

3 4/5     or      19/5

300

9/10 ÷ (-6/5)

-3/4

400

Tell whether the expression will have a positive or negative quotient without dividing.

(-5)/(4)

negative

400

-7.2 x 0.1 x (-100)

72

400

32.436 ÷ (-4.24)

-7.65

400

You can only do this when multiplying fractions. It does not work with adding, subtracting, or dividing. What is it?

Cross cancel! (Simplifying BEFORE multiplying)

400

When dividing fractions, it is helpful to remember these three words. What are they?

Keep Change Flip!

500

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

500

-6 x (-0.05) x (-0.4)

-0.12

500

When dividing decimals, which number CANNOT have a decimal? Choose one.

A) The dividend (the numerator/number on the inside)

B) The divisor (the denominator/number on the outside)

B: The divisor

500

-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

500

-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