Summary of Knowledge:
The goals of this investigation is to develop algorithms for multiplying and dividing. You will also notice number patterns. You will learn multiplication and division of integrers, to answer questions about speed, time, distance and direction of motion. Upon the completition of this investigation you will be able to divide and multiply negative numbers.
Key Vocabulary:
1. Commutative Property: the order of the addition or multiplication of
2 numbers does not change the result.2. Absolute value: the absolte value of a number is its distance from zero in a number line it is written (-4)
Task Analysis:
Multiplication and Division:
1. When you multiply/divide a negative number with another negative number your answer will be a positive.
2. When you multiply/divide an odd number of negatives, your answer be a negative number.
3. When you multiply/divide an even number of negatives, your answer will be a positive number.
Absolute Value:
1. If the number is a positive, the absolute value will be the same number because it is the distance from 0.
2. If the number is a negative, the absolute value will be the same number but positive.
Examples:
Multiplication : a. 15 x -5 = -75 c.1/8 x -3/4 =-3/32
b. -10x -7= 70 d. -5/10 x -8/10= 40/100
Division: a. -24 ÷ 6= -4 b. -35÷-5=7
c. -36/40 ÷ -2/4 =
-36/40x -4/2= 144/80 d. 4/5 ÷ -10/15=
4/5 x -15/10= -60/50
Absolute Value:
–3 = 3
Multiplying and Dividing Negatives Quiz! » Quiz maker software
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