Cogito
Grade 4 Math · Chapter 1 · Lesson 1
Ten Times Bigger
Each place is worth ten times the one to its right.
8 problems · about 14 minutes · 4.NBT.A.1
What this lesson teaches
The child explains that a digit in one place is worth ten times what it would be one place to the right.
- Each place is worth ten times the place to its right.
- The same digit means different amounts in different places.
- This pattern is what makes place value work.
Warm Up
Straightforward practice. Get the method working first.
4 problemsIn 6,283, what is the 2 worth?
Answer 200
Why It is in the hundreds place, so it is worth 200.
Moving a digit one place to the left multiplies its value by what?
Answer 10
Why Each place is worth ten times the one to its right.
In 8,340, what is the 8 worth?
Answer 8000
Why The thousands place.
In 2,916, what is the 9 worth?
Answer 900
Why The hundreds place.
Build It Up
The same ideas with more to keep track of.
2 problemsIn 7,405, what is the 4 worth?
Answer 400
Why The hundreds place.
How many times bigger is the tens place than the ones place?
Answer 10
Why One place to the left.
Stretch Yourself
Mixed problems. Work out what kind of question it is before you start.
2 problemsThe Value of a Digit: In 4,762, what is the 7 worth?
Answer 700 as its value
Why The 7 is in the hundreds place, so it is worth 700.
Ten Times: The 5 in 500 is worth ten times the 5 in which number?
Answer 50
Why 500 is ten times 50.