Title: The Ubiquitous Number Line
1The Ubiquitous Number Line
From Korean Mathematics Book 1-2-1, p 9
2The Ubiquitous Number Line
From Korean Mathematics Book 1-1-5 pg 65
- Comparison Subtraction Model
3The Ubiquitous Number Line
the time of the time of
starting cleaning finishing cleaning
From Korean Mathematics Book 2-1-6, pg 62
- Time modeled on Number Line
4The Ubiquitous Number Line
Fill in the box with a fraction or decimal.
From Korean Mathematics Book 3-2-7, p 95
Comparison of Fractions with Decimals
5The Ubiquitous Number Line
Lets find a way to add the numbers 0.5 and 0.3.
0.5 is 5 of 0.1 and 0.3 is 3 of 0.1. The sum of
0.5 and 0.3 is 8 of 0.1. 0.5 0.3 0.8
From Korean Mathematics Book 3-2-7, p 96
Addition of Decimals
6The Ubiquitous Number Line
Lets think of finding the difference between
0.56 and 0.32.
From Korean Mathematics Book 4-2-6, p 78
Subtraction of Decimals
7The Ubiquitous Number Line
Using the number line above,
From Korean Mathematics Book 4-2-6, p 78
Subtraction of Decimals
8The Ubiquitous Number Line
Stanford is making two animal shapes by dividing
in half a wire 5 m in length. Lets find out the
length of the wire for one animal shape. How can
we do the division, 5 2?
From Korean Mathematics Book 5-2-2, pg 26
- Division of Whole into Fractions on Number Line
9There are 45 children in the class.
enjoy physical education.
of the remainder like math.
How many like math?
45 students
From Korean Mathematics Book 6-2-9, p 133
Three Step, Mixed Operation
10Leads to Equations
A stack of wood is 40.5 cm high. Among them are
15 boards which are 0.9 cm thick. The rest are
1.5 cm thick. How many 1.5 cm thick boards are
there?
Identification of x
(0.9 15) (1.5 x) 40.5
From Korean Mathematics Book 6-2-9, p 135