Bryan has 70 marbles.
Adam has 20 marbles.
- What is the sum of marbles?
- How many marbles must Bryan give to Adam so both have the same number of marbles?
- How many marbles must Adam get from Bryan so both have the same number of marbles?
(a)
Total sum of marbles
= 70 + 20
= 90
(b)
Number of marbles that Bryan has more than Adam
= 70 - 20
= 50
For both Bryan and Adam to have the same number of marbles, the extra marbles must be shared equally.
Number of marbles that Bryan must give to Adam
= 50 ÷ 2
= 25
(c)
Number of marbles that Adam must get from Bryan
= Number of marbles that Bryan must give to Adam
= 25
Answer(s): (a) 90; (b) 25; (c) 25