2nd grade · Math · Unit 8 of 17
Numbers to 1000
Hundreds, tens and ones
What your child practices
Reading and building numbers up to 1000 with hundreds, tens and ones, counting forwards and backwards by 10s and 100s, even and odd numbers, estimating with 100s as benchmarks, and comparing with <, > and =.
Alabama Course of Study content standard: 2.6; 2.7; 2.8; 2.9 · counting, reading, writing and comparing numbers to 1000 with hundreds, tens and ones
How we explain it
Children can open this short lesson before they practice.
- A 3-digit number has hundreds, tens and ones.
- Count by 10s or 100s to move up quickly.
- Compare hundreds first, then tens, then ones.
Example: Count by 10s: 140, 150, 160, 170, ? Each step adds 10. 170 + 10 = 180. Answer: 180
Numbers to 1000 in Alabama
In the Alabama Course of Study, this is unit 8 of 17 in 2nd grade Math, after Graphs and before Fractions of a Whole.
Gradelings describes a child's practice on this unit as Beginning, Approaching, Meeting or Exceeding (Four practice steps). That reflects practice, not a report-card mark: the teacher decides the mark.
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
Is 215 even or odd?
- odd
- even
odd
Hint: Look at the ones digit. 0, 2, 4, 6 and 8 make an even number. An even number can be shared into pairs with none left over.
Question 2
In 925, what is the 5 worth?
925
- 5
- 500
- 50
5
Hint: Look at which place the digit is in: hundreds, tens or ones.
Question 3
Is 891 closer to 800 or 900?
- 800
- 900
900
Hint: Halfway between 800 and 900 is 850. 891 is more than that.
Question 4
Build the number 171.
Build it with tens rods, hundreds flats and ones cubes.
171
Hint: 171 is 1 hundreds, 7 tens and 1 ones.
Question 5
What number do the blocks show?
- 413
- 409
- 408
413
Hint: Count the hundreds, then the tens, then the ones.
Question 6
What is 100 less than 725?
- 625
- 620
- 629
625
Hint: The hundreds digit changes by one.