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B. Number · Number Sense: Numbers to 1000 and Fractions

Number Sense: Numbers to 1000 and Fractions: Unit Review

A1 B1.1 B1.2 B1.3 B1.4 B1.5 B1.6 B1.7About 40 minutes
Learning goals
  • I can count, read, write and show numbers to 1000.
  • I can compare, order and round numbers to 1000.
  • I can share things fairly and name shares with whole numbers, mixed numbers and fractions.
  • I can compare shares and find equivalent fractions.

Words to know

place value
The value of a digit depends on its place: hundreds, tens or ones.
round
To change a number to the nearest ten or hundred.
mixed number
A whole number and a fraction together, like 2 and one half.
equivalent fractions
Fractions that name the same amount, like one half and two fourths.

Let's review!

In this unit you counted, read, wrote, built, compared and rounded numbers all the way to 1000. Then you shared things fairly and learned about fifths, eighths and tenths, comparing shares and fractions that have different names for the same amount.

This review has a few questions from every lesson. Try each one, then press Show answer to check. If a part feels tricky, go back to that lesson for more practice.

Counting to 1000 by 1s, 10s, 25s, 50s, 100s and 200s

1

Count by 200s from 0 to 1000.

2

Count by 10s from 386 to 426.

3

Count back by 50s from 800 to 550.

4

How many cents are 7 quarters?

Reading, Writing and Using Numbers to 1000

1

Write 608 in words.

2

Write as a numeral: nine hundred forty.

3

"I take bus number 52 to school." What job does 52 do?

Place Value: Hundreds, Tens and Ones

1

What is the value of the 9 in 493?

2

Write 806 in expanded form.

3

What number do 7 flats, 2 rods and 0 units show?

4 hundreds10 tens =1 hundred6 tens3 ones
A picture for the first question below: 4 hundreds, 16 tens and 3 ones. Trade 10 of the tens for 1 more hundred, then count.

Building and Breaking Apart Numbers in Many Ways

1

What number is 4 hundreds, 16 tens and 3 ones?

2

How many tens are in 470?

3

Show 312 in a different way from 3 hundreds, 1 ten, 2 ones.

Comparing and Ordering Numbers to 1000

1

Write < or >: 673 ___ 637

2

Order from least to greatest: 482, 248, 824, 428

3

Which digits make this true? 5□1 > 571

500550600
Use this number line for rounding 586. Is 586 before or after the halfway point, 550?

Rounding to the Nearest Ten and Hundred

1

Round 586 to the nearest ten.

2

Round 586 to the nearest hundred.

3

Round 250 to the nearest hundred.

4

Round 804 to the nearest hundred.

Fair Sharing: Whole Numbers, Leftovers and Mixed Numbers

1

3 friends share 18 grapes. How many each?

2

2 friends share 11 pancakes. How much each?

3

5 kids share 16 hockey cards. How many each?

4

5 friends share 13 pancakes. How much each?

Shares Less Than One: Fifths, Eighths and Tenths

1

8 people share 1 cake. How much each?

2

5 friends share 4 waffles. How much each?

3

You have seven tenths of a pizza. How many more tenths make one whole?

Comparing Fair Shares

1

Which is bigger: one fifth or one eighth of the same bar?

2

3 pizzas are shared by 4 people, or by 8 people. Which gives each person more?

3

Which is more: 2 and three tenths or 2 and seven tenths?

Same Amount, Different Names: Halves, Fourths and Eighths

1

One half = ___ eighths

2

8 kids share 2 cakes. Name each share two ways.

3

Six eighths = ___ fourths

Same Amount, Different Names: Thirds and Sixths, Fifths and Tenths

1

Two thirds = ___ sixths

2

Three fifths = ___ tenths

3

10 kids share 4 pizzas. Name each share two ways.

Just for fun

I am a three-digit number. My hundreds digit is 1, and I am the greatest number that starts with 1. Who am I?

199!

How to use this review

  • Do the review over two or three short sittings. Each section matches one lesson.
  • Let your child use tools: base-ten blocks or quick drawings, a number line, coins, and the fraction strip kit. Using tools is part of Grade 3 math.
  • After each answer, ask "How do you know?" Explaining matters as much as the answer.
  • Note which section had mistakes, then revisit that lesson's examples, activity and practice.
Check your understanding

Quiz

1.

Counting by 1s, what comes right after 799?

2.

Which numeral is three hundred six?

3.

What is the value of the 5 in 352?

4.

What number is 2 hundreds, 15 tens and 4 ones?

5.

Which number is the greatest?

6.

Round 349 to the nearest hundred.

7.

4 friends share 10 pizzas. How much does each friend get?

8.

8 kids share 3 granola bars. How much does each kid get?

9.

One fourth is the same as:

10.

Which fraction is equal to two fifths?

For parents and teachers

Use mistakes to choose what to revisit. Each review section matches one lesson.

  • Gets stuck crossing a hundred (390, 3100) or counting backward: revisit Counting to 1000 by 1s, 10s, 25s, 50s, 100s and 200s.
  • Writes 6003 for six hundred three, misspells number words, or thinks every number tells "how many": revisit Reading, Writing and Using Numbers to 1000.
  • Mixes up the value of digits or forgets the zero placeholder (46 for 400 + 6): revisit Place Value: Hundreds, Tens and Ones.
  • Writes 2 hundreds 15 tens as 215, or can't find how many tens are in a number: revisit Building and Breaking Apart Numbers in Many Ways.
  • Compares the first digits without lining up places, or mixes up > and <: revisit Comparing and Ordering Numbers to 1000.
  • Rounds to the wrong place, looks at the wrong digit, or rounds halfway numbers down: revisit Rounding to the Nearest Ten and Hundred.
  • Makes unequal shares or cuts leftovers into the wrong number of pieces: revisit Fair Sharing: Whole Numbers, Leftovers and Mixed Numbers.
  • Doesn't cut each item when there are fewer items than sharers, or confuses fifths, eighths and tenths: revisit Shares Less Than One: Fifths, Eighths and Tenths.
  • Thinks one eighth is bigger than one fourth because 8 > 4: revisit Comparing Fair Shares.
  • Thinks four eighths is more than one half because it has more pieces: revisit Same Amount, Different Names: Halves, Fourths and Eighths.
  • Has trouble with thirds and sixths or fifths and tenths: revisit Same Amount, Different Names: Thirds and Sixths, Fifths and Tenths and use measured strips.

A few mistakes are normal. Praise the strategy your child explains, not only the right answer.