MATH REVIEW AND TEST PREP PART A
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| MULTIPLYING MIXED NUMBERS: 3 1/2 X 2 1/3 | FIRST CHANGE THEM TO IMPROPER FRACTIONS . THEN MULTIPLY THEM. AS SHOWN HERE -----
7/2 X 7/3 = 49/3 = 16 1/3
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| DIVIDING FRACTIONS- ---- 1/2 / 1/3 | MULTIPLY THE FRACTIONS , USING THE RECIPROCAL OF THE SECOND FRACTION--------------------AS SHOWN HERE:
1/2 / 1/3 = 1/2 X 3/1 = 3/2
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| TO CHANGE A DECIMAL TO A FRACTION-------- a. 0.21 | 1. DRAW A LINE BENEATH THE DECIMAL
2. FOR THE DENOMINATOR- THE DECIMAL POINT BECOMES A "1" ANY THING ELSE BECOMES A ZERO....
0.21 BECOMES 21/100
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| CHANGING A FRACTION TO A PERCENTAGE.------ a. 1 / 2 | jUST MULTIPLY BY 100
AS SHOWN HERE: 1/2 X 100/1 = 100/2 = 50%
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| CHANGING A FRACTION TO A DECIMAL.------- a. 1/2 | 1. FIRST MULTIPLY BY 100 TO GET A PERCENTAGE: 1/2 X 100 = 50 % --------
2. THEN DIVIDE YOUR ANSWER BY 100 TO GET A DECIMAL.
50/100 = 0.50
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| CHANGING DECIMAL TO PERCENT-------- a. 0.20 | JUST MULTIPLY THE DECIMAL BY 100
EXAMPLE---. 0.20 X 100 = 20%
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| ROUNDING: TO THE NEAREST WHOLE NUMBER: a. 12.333 | ANSWER = 12
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| ROUND TO THE NEAREST TENTH: a. 1.284 b. 32.34 | ANSWERS: a. 1.2
b. 32.3
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| ROUND TO THE NEAREST 100TH: a. 1.305 b. 45.666 | ANSWERS a. 1.31
b. 45.67
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| ROUND TO THE NEAREST 1000TH: a. 1.3054 b. 45.6665 | ANSWERS a. 1.305
b. 45.667
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| MULTIPLYING POSITIVE AND NEGATIVE SIGNS; #1. (-2) (2) (-2) #2. (2) (-3) (-1) (-1) | RULE: JUST COUNT THE NUMBER OF NEGATIVE SIGNS IN YOUR PROBLEM. IF YOU HAVE AN ODD NUMBER OF NEGATIVES (1, 3, 5, 7.......) THEN YOU ANSWER IS NEGATIVE.
OTHERWISE YOUR ANSWER IS POSITIVE
ANSWERS: #1. 8 (TWO NEGATIVES--NOT ODD #)
#2. -6
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| DIVIDING NEGATIVE INTERGERS (NUMBERS): a. -2 / 2 b. -2/-2 | ANSWERS: a. -1 ( ONE NEGATIVE SIGN-ODD NUMBER OF NEGATIVE SIGNS)
b. 1 (NOT ODD NUMBER OF NEGATIVE SIGNS)
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| CHANGE THE FOLLOWING NUMBERS TO A SCIENTIFIC NOTATION. #1. 2345.45 #2. 100009.23 #3. 0.000023 #4. 0. 00234 | ANSWERS-
#1. 2. 34545 EE 3
#2. 1. 000923 EE 4
# 3. 2.3 EE -5
#4. 2.34 EE -3
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| CHANGE THE FOLLOWING MIXED NUMBERS INTO IMPROPER FRACTIONS- #1. 3 1/2 #2. 4 1/3 #3. 7 2/4 | ANSWERS: #1. 7/2
#2. 13/3
#3. 30/4
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| CHANGE THE FOLLOWING IMPROPER FRACTIONS INTO MIXED NUMBERS: #1. 4/3 #2. 8/5 #3. 9/2 | ANSWERS:
#1. 1 1/3
#2. 1 3/5
#3. 4 1/2
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| CHANGE THE FOLLOWING SCIENTIFIC NOTATIONS INTO NATURAL NUMBERS a. 1.3 EE -3 b. 1.543 EE -5 c. 2. 45 EE 3 d. 3.9 EE 4 | ANSWERS: a. 0.0013
b. 0.0000154
c. 2550 d. 39000
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| PLEASE REDUCE THE FOLLOWING FRACTIONS TO THEIR LOWEST TERMS: a. 20/60 b. 33/66 c. 12/ 18 | ANSWERS:
a. 1/3
b. 1/2
c. 2/3
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| FIND THE LCD ( LOWEST COMMON DENOMINATOR- ALSO CALLED LCM) GIVEN THE FOLLOWING FRACTIONS: 1/2 , 3/5, 2/4, 4/6 , 2/3 | ANSWER: LCD (ALSO CALLED LCM)= 60
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Created by:
eccharles77
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