Fill in the blanks with units (Eg 1 u) or unit equations (Eg 1 u + 2).
Bryan and Adam have 120 marbles.
Bryan has 40 less marbles than Adam.
- Number of marbles that Bryan has = _____
- Number of marbles that Adam has = _____
- Total number of marbles = _____
- 1 u = _____
Choose the person who has less marbles to be 1 u.
Bryan has 40 less marbles than Adam.
So, Bryan has less marbles.
(a)
Number of marbles that Bryan has = 1 u
(b)
Number of marbles that Adam has = 1 u + 40
(c)
Total number of marbles
= 1 u + 1 u + 40
= 2 u + 40
(d)
Total number of marbles = 120
2 u + 40 = 120
2 u = 120 - 40 = 80
1 u = 80 ÷ 2 = 40
Answer(s): (a) 1 u; (b) 1 u + 40; (c) 2 u + 40; (d) 40