Tenths Discovery Anchor Chart Lesson 1
Tenths Discovery
Exploring parts of a whole
The Big Idea
When we divide 1 Whole into 10 equal parts , each part is called a tenth .
Strip Diagram (1 Whole)
1/10
0 1 Whole
Three Ways to Write It
Unit Form
1 tenth
Fraction
\( \frac{1}{10} \)
Decimal
0.1
Metric Models
Mass (Kilograms)
10 bags of rice (0.1 kg each) = 1 kg
5 bags = 0.5 kg = \( \frac{5}{10} \) kg
Length (Meters)
1 meter divided into 10 decimeters
Shaded: 0.3 m = \( \frac{3}{10} \) m
On the Number Line
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Remember: 10 tenths = 1 Whole! | 0.1 + 0.9 = 1.0
Place Value Power Anchor Chart Lesson 3
Place Value Power
Expanding our understanding of the base-ten system
Place Value Chart
Tens
Ones
Tenths
10
10
2
1
1
1
3
0.1
0.1
0.1
0.1
4
decimal
23.4
The Rule of 10
10 Times Greater
Move one place to the left (\(\times 10\))
1/10 of the Value
Move one place to the right (\(\div 10\))
Two Ways to Expand
1
Fractional Notation
\( (2 \times 10) + (3 \times 1) + (4 \times \frac{1}{10}) \)
2
Decimal Notation
\( (2 \times 10) + (3 \times 1) + (4 \times 0.1) \)
Number Line Connection
23.4
23 24
Unit Form: 23.4 is 234 tenths!
Beyond the Whole Anchor Chart Lesson 2
Beyond the Whole
Mixed Numbers and Decimals Greater Than 1
Area Models
Example: 2 and 4 tenths
\( 2 \frac{4}{10} = 2.4 \)
Unit Form Power
Think of the whole numbers as tenths, too!
24 tenths = 2.4
(20 tenths + 4 tenths)
Metric Measurement
On a centimeter ruler, the tiny lines show tenths .
0
1
2
2.4 cm
.4
3
How many more tenths to make 3?
2.4 + 0.6 = 3.0
Equivalence
\( 2.4 = 2 + 0.4 \)
\( 2 \frac{4}{10} = 2 + \frac{4}{10} \)
2 ones 4 tenths
Key Fact: The decimal point separates whole numbers from parts!
Tenths Explorer Mini Charts Tenths Explorer
Mini-Charts for Notebooks
Name: __________________________
Cut and glue these into your math notebook!
Lesson 1
Discovery
1 tenth \( \frac{1}{10} \) 0.1
10 bags (0.1 kg) = 1 kg
10 decimeters = 1 m
Lesson 2
Mixed Units
\( 2 \frac{4}{10} = 2.4 \)
"2 ones and 4 tenths"
2.4 + 0.6 = 3.0
Lesson 3
Place Value
\( (2\times10) + (3\times1) + (4\times\frac{1}{10}) \)
\( (2\times10) + (3\times1) + (4\times0.1) \)
The Rule
Rule of 10
Left: 10x GREATER
Right: 1/10 VALUE
Unit Form
23.4 = 234 tenths
Quick Observation
One thing I noticed about the tenths place...
A connection to my everyday life...
