← Back to course
Number Trail Grade 4 / Week 10 / Number Hunt
6/6
Week 10 · Tenths and hundredths

Number Hunt

Number Hunt
// Decimals show parts of a whole
⏱ about 15 min

Saturday: Number Hunt

Lizzy the Lizard packs her notebook, her magnifying glass and a tape measure.

"Today we hunt for decimals," she tells Bennie the Bear.

They measure a pinecone, a feather and a long blade of grass.

Each length is less than a meter, so Lizzy writes it in hundredths.

"The grass is 0.35 meter, and the feather is 0.2 meter," she says.

Bennie checks her notebook. "And the grass is the longer one, because 35 hundredths is more than 20 hundredths."

Hunt for decimals

Decimals hide on rulers, tape measures, measuring jugs and scales.

When you find one, read its places: ones, tenths, hundredths.

Write it as a fraction too, like 0.35 = 35/100.

Try it: Number Hunt
Measure 4 small things at home in centimeters with a grown-up.
Write each length as hundredths of a meter, like 0.18 meter.
Look for a measuring jug or a scale with decimals on it.
Put all your decimals in order from least to greatest.
WHAT DID YOU LEARN?
  • Read the question.
  • Tap your answer.
7/10 = ?
0.35 = ?/100
0.2 ? 0.35
3/10 + 6/100 = ?
◇ DECIMAL FLIP WITH A GROWN-UP
Write the digits 0 to 9 on small cards. Mix them up face down.
Each of you flips two cards and makes a decimal like 0.47.
Say your decimal in tenths and hundredths.
The greater decimal wins a point. Talk about how you know.
Play five rounds, then trade tips.
Draw one thing you measured. Write its length as a decimal of a meter.
For a grown-up
This week your child wrote tenths and hundredths as fractions and as decimals.
They learned that 3/10 = 30/100, so 3/10 + 4/100 = 34/100.
They compared decimals by looking at tenths first, then hundredths.
Ask them why 0.5 is greater than 0.45.

Great hunting! Next week Hazel helps us measure.

← Friday