Answer:
So Number 1 is 4
Number 2 is 2
(Not sure about 3)
Number 4 is 54
(Not sure about 5)
Number 6 is
Step-by-step explanation:
Number 1: He needs 5x3 to get 15 balloons, but since he need more than provided, he needs one more pack.
Number 2: He played 2 rounds, and each round got 4 points, 4x2=8.
Number 4: If she had 8x8=64, and subtracted 10, she has 54.
Number 6: So you should make the fractions improper fractions, (fractions that have a numerator thats more than the denominator) so 2 1/4 = 9/4 and 3 1/4 = 13/4 and then multiply 13 x 9= 117 and then 4x4= 16 so you have 117/16 and then when you simplify it you get: 7 5/16
Hope this helps and also for the other questions I think someone else can get those :)