Cogito
Grade 4 Math · Chapter 6 · Lesson 1
Tenths
A fraction written a different way.
10 problems · about 14 minutes · 4.NF.C.6
What this lesson teaches
The child writes a fraction with denominator 10 in decimal notation.
- One whole cut into 10 pieces gives tenths.
- 7/10 and 0.7 are the same amount.
- Read a decimal as the fraction it is.
Warm-Up Review
From earlier lessons. Loosen up before the new work.
2 problemsReview — Line Plots with Fractions: Difference between 7/8 and 2/8, in eighths?
Answer 5
Why 5/8.
Review — Multiplying a Fraction by a Whole Number: 4 × 2/9. What is the top number of the answer?
Answer 8
Why 8/9.
Warm Up
Straightforward practice. Get the method working first.
4 problemsHow many tenths are in 0.8?
Answer 8
Why 0.8 is 8/10.
What is a decimal?
Answer A fraction written another way.
Why A decimal is a fraction with denominator 10 or 100, written differently.
How many tenths are in 0.6?
Answer 6
Why Six tenths.
How many tenths make one whole?
Answer 10
Why 10/10.
Build It Up
The same ideas with more to keep track of.
2 problemsHow many tenths are in 0.9?
Answer 9
Why Nine tenths.
Is 0.5 the same as 5/10?
Answer Yes. Two ways to write it.
Why Same amount, different writing.
Stretch Yourself
Mixed problems. Work out what kind of question it is before you start.
2 problemsThe Water: A jug is 4/10 full. How many tenths is that?
Answer 4 tenths
Why 4 tenths, written 0.4.
The Race: Leo finished 9/10 of the race. How many tenths are left?
Answer 1 tenths
Why 1 tenth, written 0.1.