Question

-1/4 + (-2/7)
A. -15/28
B. -3/11
C. 9/14
D. 3/28

Answer 1

@hartnn can you help?

Answer 2

-1/4-2/7
we need to make the denominator same.
what is LCM of 4 and 7 ?

Answer 3

4 and 7? LCM

Answer 4

yes, LCM. what is the Least Common Multiple of 4 and 7

Answer 5

oh i thought their lcm's were 4 and 7

Answer 6

nopes, common multiple is 28 .....
so multiply and divide 1st fraction by 7 and
multiply and divide 2nd fraction by 4

Answer 7

oh.... ok yea, 7/-8?

Answer 8

O.o how?
\(\huge \frac{-1}{4}\times \frac{7}{7} -\frac{2}{7}\times \frac{4}{4}=\frac{-7-8}{28}=?\)

Answer 9

-7.28? im sorry i am doing this on calculator

Answer 10

-7-8 = -15
no need of calculator
-15/28 is in your options

Answer 11

omg thank you so much!

Answer 12

@hartnn this one also? 11 1/3 ÷ 4 1/4?

Answer 13

11 1/3 = ?