Multiplying Integers: 3 Numbers
(2)(3)(3) = ?
18
3 x 7 = ?
7 + 7 + 7 = 21
(-6) x (-3) =?
18
Multiplying a negative number by a negative number gives you a _________ number.
Positive
The temperature rises 3°C each hour for four hours. By how many degrees Celsius did the temperature rise in four hours?
(+3) × (+4) = +12
The temperature increased by a total of +12°C.
(-5)(-2)(8)=?
80
(-9) x 8 = ?
8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8= -72
(-11) x 11 = ?
-121
Multiplying a negative number by a positive number gives you a _________ number.
Negative number
The price of one share of stock fell 4 dollars each day for 8 days. How much value did one share of the stock lose after 8 days?
-4 × 8 = -32
$-32 less
(-10)(-10)(-10)=?
-1000
(-3) x (-33) = ?
33 + 33 + 33 = 99
0 x (-8) = ?
0
Multiplying a positive number by a positive number gives you a _________ number.
Positive
From sea level, a submarine descends 40 feet per minute. Where is the submarine in relation to sea level 5 minutes after it starts descending?
-40 × 5 = -200 feet
(-6)(-5)(0)=?
0
(-7) x 20 = ?
20+20+20+20+20+20+20= -140
(-12) x (-26) =?
312
Multiplying a positive number by a negative number gives you a _________ number.
Negative
A store loses fifty dollars a day over six days. How much money was lost in total over these six days?
(–50) × (+6)= –300 dollars was lost
(10)(3)(-12)=?
-360
8 x (-25) = ?
25+25+25+25+25+25+25+25= -200
(-55) x 8 =
- 440
Multiplying a positive number by zero equals ______.
Zero.
Integers are negative and positive whole numbers, and zero is neither positive or negative.
A mountain climber climbed up a cliff 50 feet at a time. He did this 5 times in one day. What was the overall change in his elevation?
50 x 5 = 250 feet