March 9, 2015

Presented by:

Bolívar Taveras

Prof. Liudmila Rikun

GE-184

1.Signed numbers

Solve the following

1) (-6)+(-1)

A. -7

B. -5 substracted instead of adding.

C. 7 answer is not positive 7

D. 5 substracted and used wrong sign.

2) -3+7

A. -4 wrong symbol

B. 4 correct answer

C. -10 added instead of substracting

D. 10 added instead of substracting

3) -6.4+3.9

A. -2.5 correct answer

B. 4.1 wrong quantity

C. 2.5 positive instead of negative

D. -4.1 wrong quantity

4) 5-7

A. 12 added instead of substracting

B. 2 wrong symbol

C. -12 added instead of substracting

D. -2 correct answer

5) (-2)-(-6)

A. -8 added the numbers

B. 4 correct answer

C. -4 wrong symbol

D. 8 added the numbers

2.Fractions

Solve the following problems.

1) 3/4 + 5/6

A. 8/10 just added the denominator and numerator

B. 21/12 wrong adding

C. 8/12 wrong adding

D. 19/12 correct answer

2) 2/8 + 5/6

A. 7/14 just added the denominator and numerator

B. 7/24 wrong adding

C. 23/24 wrong adding

D. 13/12 correct answer

3) 3/8 + 5/16

A. ½ added wronh

B. 11/16 correct answer

C. 8/16 just added numerators

D. 13/16 added wrong

4) 9/15 + 5/20

A. 17/20 added wrong

B. 14/60 just added denominators

C. 14/35 added numerator and denominator

D. 15/20 correct answer

5) 2/7 + 1/14

A. 3/14 just added numerator and left common denominator

B. 4/14 added wrong

C. 5/14 correct answer

D. 3/21 wrong common denominator and just added numerators

3.Proportions, ratios and percent

Solve the following

1) 5/6 = x/30

A. X=36 miltiplied wrong

B. X=26 multiplied wrong

C. X=.03 did not follow right procedure

D. X=25 correct answer

2) Solve the proportion 3/6 = x/24

A. X=13 wrong answer

B. X=0.02 wrong procedure

C. X=48 wrong procedure

D. X=12 correct answer

3) What is 15% of 200?

A. 50 wrong answer

B. 300 did not move decimal point correctly

C. 3 did not move decimal point correctly

D. 30 correct answer

4) Determine 26% of 300

A. 780 wrong answer

B. 7.8 decimal point on wrong place

C. 78 correct answer

D. .78 decimal point on wrong place

5) at a high school the ratio of boys to girls is 8:9 if 374 students attend the high school how many of them are boys?

A. 198 this would be correct for girls

B. 167 wrong answer

C. 176 correct answer

D. 8/17…