Question

For questions 1- 3 find the exact sum or difference.

question 1. 7/15 + 9/15 + 4/15 =

A) 7/9
B) 1 13/15
C) 2 2/9
D) 1 1/3


question 2. Gerri spends 1/21 of her money on pencils and 2/21 on paper. what friction of her money does she spend? Give the answer in the simplest form.

A) 1/7
B) 3/20
C) 4/21
D) 8/7


question 3. 5/7 - (3/14 + 3/12) =

A) 2/7
B) 1/21
C) 1/7
D) 1 1/7

Answer 1

D, Because 7/15 + 9/15 is 16/15 + 4/15 =20/15 which equals 1 5/15 which turns into 1 1/3
A, 1/21 + 2/21 = 3/21 and that equals 1/7

C, 3/14+3/12 turns into 3/14+5/14= 10/14 - 8/14= 2/14=1/7