Step-by-step explanation:
1.
a. Mathematical Sentence.
1/2 × 6/8 = N
b. Solution.
1/2 × 6/8 = (1×6)/(2×8) = 6/16 = 3/8
c. Final answer.
The fraction of the tank of gas he uses is 3/8.
2.
a. Mathematical Sentence.
2/3 × 15/1 = N
b. Solution.
2/3 × 15/1 = (2×15)/(3×1) = 30/3 = 10
c. Final answer.
10 of the prizes are for relay winners.
3.
a. Mathematical Sentence.
30 - 2/5 × 30/1 = N
b. Solution.
30 - (2×30)/(5×1) = 30 - 60/5 = 30 - 12 = 18
c. Final answer.
18 wore their P.E. uniform.
