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
Nov 15, 18 05:01 PM
Modeling multiplication with number counters - Learning multiplication is fun!
New math lessons
Your email is safe with us. We will only use it to inform you about new math lessons.
Nov 15, 18 05:01 PM
Modeling multiplication with number counters - Learning multiplication is fun!
Our Top Pages
Formula for percentage
Compatible numbers
Basic math test
Basic math formulas
Types of angles
Math problem solver
Algebra word problems
Surface area of a cube
Finding the average
Scale drawings
Everything you need to prepare for an important exam!
K-12 tests, GED math test, basic math tests, geometry tests, algebra tests.
Real Life Math Skills
Learn about investing money, budgeting your money, paying taxes, mortgage loans, and even the math involved in playing baseball.