Collin bought 1/2 a pound of chocolate at Rocky Mountain Chocolate factory. Later, they went to The Sweet Shoppe and he bought 6/9 pounds more chocolate. How much chocolate did he buy that day?

1 1/6

Step-by-step explanation:

1/2+6/9

common denominator is 18 (2×9)

now lets divide what's bellow(denominators) by 18 , then multiply to numbers above the line(nominators) by that number and finally find sum of them

1) 18/2=9, 9×1=9

2)18/9=2, 2×6=12

answer will be sum of them with common denominator:

(12+9)/18=21/18

we can simplify both, up and down (denominator and nominator) of that rational number. I'll divide both by 3

(21:3)/(18:3)=7/6= 1 1/6

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8

2160ft3

step-by-step explanation: