Adam and Charlie have 20 stickers.
Adam has 3 times as many stickers as Charlie.
- How many stickers does Charlie have?
- How many stickers does Adam have?
- How many stickers does Adam have more than Charlie?
- How many stickers does Charlie have less than Adam?
(a)
Focus on the sentence with the word 'times'.
Assign 1 u to the variable that is found after the word 'times'.
Number of stickers that Charlie has = 1 u
Number of stickers that Adam has = 3 u
Total number of stickers they have = 3 u + 1 u = 4
4 u = 20
1 u = 20 ÷ 4 = 5
Number of stickers that Charlie has
= 1 u
= 5
(b)
Number of stickers that Adam has
= 3 u
= 3 x 5
= 15
(c)
Number of stickers that Adam has more than Charlie
= 3 u - 1 u
= 2 u
= 2 x 5
= 10
(d)
Number of stickers that Charlie has less than Adam
= 3 u - 1 u
= 2 u
= 2 x 5
= 10
Answer(s): (a) 5; (b) 15; (c) 10; (d) 10