5th grade · Math · Unit 1 of 14
Numbers to a Million
Read, write and compare big numbers
What your child practices
Place value to 1,000,000: digit values, standard and expanded form, number words, rounding, ordering, and using benchmarks like 500,000 on a number line.
Oregon State Standards learning standard: 5.NBT.A.1 · place value in multi-digit numbers
How we explain it
Children can open this short lesson before they practice.
- Each place is worth 10 times the place to its right.
- Read big numbers in groups of three digits: thousands, then ones.
- To compare, start at the left-most place and look for the first difference.
Example: Write four hundred twelve thousand, three hundred five in digits. Thousands group: 412. Ones group: 305. Put them together: 412,305. Answer: 412,305
Sample questions
A taste of this unit. In the app, questions change every time and get easier or harder to match your child.
Question 1
Write this number using digits: eight hundred eighty-five thousand seven hundred eleven.
answer box
885711
Hint: Split the number at the word “thousand”. Write the thousands part, then the last three digits. Use a 0 to hold any empty place.
Question 2
What number is 10,000 more than 294,357?
answer box
304357
Hint: Only the ten thousands digit should change by 1. If that digit is 9, regroup with the place to its left.
Question 3
What number is 200,000 + 10,000 + 9000 + 300 + 70?
answer box
219370
Hint: Each part fills one place value. Write the digits from the greatest place to the ones, and put a 0 in any place that is missing.
Question 4
In 497 356, what is the value of the digit 9?
- 90,000
- 900,000
- 900
- 9000
90,000
Hint: Name the place of the 9, counting from the right: ones, tens, hundreds, thousands, ten thousands, hundred thousands. The digit is worth 9 of that place.
Question 5
Which number is closest to 750,000?
- 745,300
- 74,530
- 710,600
- 780,200
745,300
Hint: Find how far each number is from the benchmark. Check the number of digits too: a number with fewer digits is much smaller.
Question 6
Round 205,159 to the nearest ten thousand.
- 210,000
- 200,000
- 205,000
- 190,000
210,000
Hint: Look at the digit just to the right of the ten thousands place. If it is 5 or more, round up; if it is less than 5, round down. Then every place to the right becomes 0.