Answer:
3
8
+
1
3
=
17
24
Result in decimals: 0.70833333333333
Calculation steps:
3
8
+
1
3
=
3 × 3
8 × 3
+
1 × 8
3 × 8
=
9
24
+
8
24
=
9 + 8
24
=
17
24
As she gave out the reds in groups of 13 and the blues in sets of 20, our answer has to be divisible by both of these!
think of it like finding the lowest common denominator for a fraction!
in this case, the lowest number both go into is 260 (13X20)
6.30 dollars / 12 sodas = $0.525 cents each soda
9. Multiply the money he has by the portion he spent:
75 x 3/5 = (75 x3)/5 = 225/5 = 45
He spent $45
10. First rewrite 4 1/8 as an improper fraction
33/8
Now multiply by 1/3:
33/8 x 1/3 = (33 x1) /(8 x 3) = 33/24 = 1 3/8
She spent 1 3/8 hours studying math.
