Grade 2 · Place Value · MAT-02-PV-005
Skip-Count by 5s, 10s, and 100s
Skip-count forward by 5s, 10s, and 100s within 1000.
Learning objectives
What you should be able to do
- Skip-count forward by 5s, 10s, and 100s within 1000.
- Describe digit patterns created by repeated equal jumps.
- Use skip-counting to solve grouping, time, money, and place-value problems.
Prerequisite check
Make sure the foundation is ready.
Checks the Grade 1 pattern used to extend skip-counting ranges.
Learn
Build the idea from meaning, not memorization.
Skip-counting is repeated equal addition
Counting by 5s means add 5 each time. Counting by 10s means add 10 each time. Counting by 100s means add 100 each time. The repeated jump creates predictable patterns.
Counting by 10s changes the tens place predictably
Starting at a number such as 243 and adding 10 keeps the ones digit 3 while the tens place advances: 243,253,263,273. Crossing 293 to 303 also changes the hundreds place through regrouping.
Counting by 100s preserves tens and ones
Adding 100 changes the hundreds amount while the last two digits stay the same: 146,246,346,446. This pattern reflects place value directly.
Counting by 5s connects to clocks and nickels
Five-minute intervals and 5-cent values are natural skip-counting contexts. Repeated groups make counting faster than counting every unit individually.
Interactive math lab
Change it. See what stays true.
Number Line Explorer
Move along the number line.
4 is one less. 5 and 6 is one more.
- jump by 5
- jump by 10
- jump by 100
- cross boundary
Worked examples
Twenty different ways to see the concept work.
Count by 5s from 0 to 25.
0,5,10,15,20,25Add 5 each step.
Continue 35,40,45,__.
50Add 5.
Count by 10s from 20 to 70.
20,30,40,50,60,70Add 10.
Continue 145,155,165,__.
175Add 10 while ones stay 5.
Count by 100s from 100 to 500.
100,200,300,400,500Add 100.
Continue 246,346,446,__.
546Add 100; tens and ones stay 46.
What is 5 more than 60?
65One skip-count-by-5 jump.
What is 10 more than 287?
297Add one ten.
What is 100 more than 432?
532Add one hundred.
Count five nickels in cents.
5,10,15,20,25 centsEach nickel adds 5 cents.
Count clock minutes at each number from 1 to 4.
5,10,15,20 minutesEach clock number marks another 5 minutes.
Three jumps of 10 from 42.
42→52→62→72Add 30 total.
Four jumps of 100 from 115.
115→215→315→415→515Add 400 total.
Fill in: 290,300,310,__.
320Continue by 10 across a hundred boundary.
Fill in: 985,990,995,__.
1000Continue by 5.
Which pattern is by 100s: 307,407,507 or 307,317,327?
307,407,507Each change is 100.
Which digit often alternates or cycles when counting by 5s?
The ones digit ends in 0 or 5 for multiples of 5Adding 5 creates that pattern.
Starting 13, count by 10s three steps.
13,23,33,43Ones digit stays 3.
Starting 72, count by 100s two steps.
72,172,272The last two digits remain 72.
Explain skip-counting as multiplication preparation.
Repeated equal jumps represent equal groupsLater multiplication summarizes repeated addition efficiently.
Practice
Guided practice with hints
01Continue 15,20,25,__.
Hint: Add 5.
Answer: 30
02Continue 120,130,140,__.
Hint: Add 10.
Answer: 150
03Continue 308,408,508,__.
Hint: Add 100.
Answer: 608
04What is 10 more than 459?
Hint: Add one ten.
Answer: 469
05Count four nickels.
Hint: Use 5-cent jumps.
Answer: 20 cents
06Count by 5s from 980 to 1000.
Hint: Add 5 each time.
Answer: 980,985,990,995,1000
Practice
Independent practice
01Count by 5s: 0 to 30.
Answer: 0,5,10,15,20,25,30
02Count by 10s: 45 to 95.
Answer: 45,55,65,75,85,95
03Count by 100s: 125 to 525.
Answer: 125,225,325,425,525
0410 more than 376.
Answer: 386
05100 more than 609.
Answer: 709
06Fill 470,480,__,500.
Answer: 490
07Fill 885,890,__,900.
Answer: 895
08Three nickels equal how many cents?
Answer: 15 cents
Common mistakes
Learn to catch the error, not just the answer.
Connect each jump to a place-value unit: +10 changes tens, +100 changes hundreds, with regrouping when needed.
Keep every jump equal to 5.
Continue the same addition rule across 99/100 or 999/1000 transitions.
Applications & challenge
Use the idea beyond a single exercise.
Applications
- Count collections of nickels by 5 cents instead of counting pennies one by one.
- Read elapsed minutes around an analog clock using 5-minute skip-counts.
Challenge problems
Start at 7 and count by 10s five jumps.
7,17,27,37,47,57
Start at 35 and count by 100s to 435.
35,135,235,335,435
Why does the ones digit stay the same when adding 10?
A ten has zero ones, so only higher place values change unless regrouping affects them.
Explain how skip-counting by 5 prepares for multiplication.
Each step adds another equal group of 5, which multiplication later abbreviates.
Flashcards
Retrieve it from memory.
Flashcards
Card 1 of 6
Game mode
Skip-Count Hopper
Choose a jump size and land on target numbers using equal repeated jumps.
Practice
Mastery check
01Count by 5s from 10 to 30.
Answer: 10,15,20,25,30
02Count by 10s from 123 to 163.
Answer: 123,133,143,153,163
03Count by 100s from 250 to 650.
Answer: 250,350,450,550,650
04What is 10 more than 690?
Answer: 700
05What is 100 more than 825?
Answer: 925
06How many cents are 4 nickels?
Answer: 20 cents
07Why do equal jumps matter?
Answer: Skip-counting follows repeated addition by the same amount.
08How does counting by 100 affect the last two digits?
Answer: They usually stay the same because 100 has zero tens and ones.
Terminology
Words to know
- skip-count
- Count by repeatedly adding the same amount instead of one.
- interval
- The equal amount between successive numbers in a sequence.
- pattern
- A predictable structure that repeats or develops according to a rule.
- multiple
- A number reached by repeated equal groups of another number; formally developed further in later grades.
Continue learning
Connected concepts
Curriculum references
Standards and instructional references
California Common Core State Standards for Mathematics — 2.NBT.A.2
Counting within 1000 and skip-counting by 5s,10s,100s.