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Why Do Measurements Need Units Smaller Than One?

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A Peek Beyond the Point · The need for smaller units · 3:10

You'll learn: Measurements rarely come out in whole units, so we subdivide units to measure more precisely.

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Why Do Measurements Need Units Smaller Than One?

3:10

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Why Do Measurements Need Units Smaller Than One?

You'll learn: Measurements rarely come out in whole units, so we subdivide units to measure more precisely.

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Next topic

Understanding tenths

2

Build Tenths by Dividing One Whole
3:04
Build Tenths by Dividing One Whole
You'll learn: Divide one whole into ten equal parts to make tenths, written as fractions.
Regroup Ten Tenths as One Whole
3:04
Regroup Ten Tenths as One Whole
You'll learn: Ten tenths regroup into one whole, just as ten ones make a ten.

Next topic

Understanding hundredths

2

Make Hundredths by Dividing Tenths
3:06
Make Hundredths by Dividing Tenths
You'll learn: Dividing each tenth into ten equal parts makes hundredths.
Regroup Hundredths Before Writing Decimals
3:02
Regroup Hundredths Before Writing Decimals
You'll learn: Regroup hundredths into tenths and wholes before writing the decimal.

Next topic

Decimal place value and notation

2

Why Does Decimal Place Value Keep Dividing by Ten?
3:08
Why Does Decimal Place Value Keep Dividing by Ten?
You'll learn: Each place is one-tenth of the place to its left, so place value keeps dividing by ten, giving thousandths and beyond.
Read and Write Decimals Using Expanded Form
3:02
Read and Write Decimals Using Expanded Form
You'll learn: Write a decimal in expanded form to read and write it correctly.

Next topic

Converting measurement units

2

Convert Lengths and Masses Using Decimal Units
3:22
Convert Lengths and Masses Using Decimal Units
You'll learn: Metric length and mass units step by tens, hundreds and thousands, so one decimal-shift method converts both.
Connect Rupees and Paise with Decimals
3:07
Connect Rupees and Paise with Decimals
You'll learn: Paise are hundredths of a rupee, so money amounts are two-place decimals.

Next topic

Equivalent and ordered decimals

2

Why Does Adding a Trailing Zero Leave a Decimal Unchanged?
3:27
Why Does Adding a Trailing Zero Leave a Decimal Unchanged?
You'll learn: A trailing zero after the last decimal digit adds zero tenths or hundredths, so the value is unchanged.
Compare and Order Decimals by Place Value
3:18
Compare and Order Decimals by Place Value
You'll learn: Compare decimals place by place from the left to order them.

Next topic

Decimals on number lines

3

Zoom into a Number Line to Locate a Decimal
3:17
Zoom into a Number Line to Locate a Decimal
You'll learn: Zoom into an interval of the number line again and again to locate a decimal precisely.
Find the Distance Between Two Decimals
3:19
Find the Distance Between Two Decimals
You'll learn: The distance between two decimals is their difference, found on the number line.
Can You Always Find a Decimal Closer to a Target?
3:24
Can You Always Find a Decimal Closer to a Target?
You'll learn: Between any two decimals there is always another, so we can get as close to a target as we like.

Next topic

Decimal addition and subtraction

2

Regroup to Add and Subtract Decimals
3:15
Regroup to Add and Subtract Decimals
You'll learn: Line up places and regroup across the point to add and subtract decimals.
Find the Next Terms in a Decimal Sequence
3:17
Find the Next Terms in a Decimal Sequence
You'll learn: Find the constant change in a decimal sequence to continue it.