by Gary Salisburger
(Kent, Washington)
Ming and Chuck were walking home one afternoon and decided to draw a chalk line on the road from school to Chuck's house.
They started out with a box of chalk and realized that one piece only lasted for two-thirds of a block.
If they had 12 pieces of chalk in the box, for how many blocks were they able to draw a line? How do you know?
Solution
1 piece ----------- 2/3 of a block
2 pieces ---------- 2/3 + 2/3 = 4/3 = 3/3 + 1/3 = 1 + 1/3
3 pieces ---------- 1 + 1/3 + 2/3 = 1 + (1 + 2) / 3 = 1 + 3/3 = 1 + 1 = 2
Based on this pattern, 6 pieces can do 4 blocks
Therefore, 12 pieces can do 8 blocks.
A quicker way to solve this problem is to multiply
12 by 2/3
12 times 2/3 = (12 * 2) / 3 = 24 / 8 = 8
Apr 03, 17 09:12 AM
Learn to divide using partial quotients. Understand the concept fast!
New math lessons
Your email is safe with us. We will only use it to inform you about new math lessons.
Apr 03, 17 09:12 AM
Learn to divide using partial quotients. Understand the concept fast!