Fill in the blanks with units (Eg 1 u) or unit equations (Eg 1 u + 2).
Adam and Bryan have 140 marbles.
Adam has 80 less marbles than Bryan.
- Number of marbles that Adam has = _____
- Number of marbles that Bryan has = _____
- Total number of marbles = _____
- 1 u = _____
Choose the person who has less marbles to be 1 u.
Adam has 80 less marbles than Bryan.
So, Adam has less marbles.
(a)
Number of marbles that Adam has = 1 u
(b)
Number of marbles that Bryan has = 1 u + 80
(c)
Total number of marbles
= 1 u + 1 u + 80
= 2 u + 80
(d)
Total number of marbles = 140
2 u + 80 = 140
2 u = 140 - 80 = 60
1 u = 60 ÷ 2 = 30
Answer(s): (a) 1 u; (b) 1 u + 80; (c) 2 u + 80; (d) 30