Counting to 100 by 10s - Complete Guide & Exercises

Master counting by tens: number sequences, visual patterns, skip counting, and step-by-step solutions through these 3 detailed exercises.

Solution: Exercises 1 to 3
1 Skip Counting Sequence
Exercise 1
Fill in the missing numbers in the sequence:
10, 20, ___, 40, ___, 60, ___, 80, ___, 100
Definition:

Skip counting by 10s: Adding 10 to each number to get the next number in the sequence

Counting method:
  1. Start with the first number (10)
  2. Add 10 to get the next number
  3. Continue adding 10 until reaching 100
10
20
30
40
50
60
70
80
90
100
Step 1: Identify the pattern

We're counting by 10s: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100

Step 2: Fill in the missing numbers

After 20 comes 30, after 40 comes 50, after 60 comes 70, after 80 comes 90

Step 3: Complete the sequence

10, 20, 30, 40, 50, 60, 70, 80, 90, 100

Answer: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100
Final answer:

The completed sequence is: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100

Applied rules:

• Pattern recognition: Each number increases by 10

• Addition: Add 10 to each number to get the next

• Sequential order: Numbers must be in ascending order

10
1st ten
→
20
2nd ten
→
30
3rd ten
→
40
4th ten
→
50
5th ten
2 Number Pattern Recognition
Exercise 2
Which number comes next in this pattern?
10, 20, 30, 40, 50, ___
Definition:

Number pattern: A sequence where each number follows a specific rule (in this case, adding 10)

10
+
10
=
20
+
10
=
30
+
10
=
40
+
10
=
50
+
10
=
60
Step 1: Analyze the given numbers

10, 20, 30, 40, 50 - each number is 10 more than the previous

Step 2: Apply the pattern rule

Add 10 to the last number: 50 + 10 = 60

Step 3: Confirm the pattern continues

The pattern remains consistent: 60 would be followed by 70, 80, etc.

Answer: 60
Final answer:

The next number in the pattern is 60

Applied rules:

• Pattern identification: Recognize the consistent increment of 10

• Arithmetic progression: Each term increases by the same amount

• Logical continuation: Extend the pattern following the established rule

10
20
30
40
50
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
3 Counting Practice
Exercise 3
Count by 10s starting from 0 up to 100. Write the complete sequence.
Definition:

Counting by 10s: Starting from a base number, repeatedly adding 10 to generate the sequence

0
→
10
→
20
→
30
→
40
→
50
→
60
→
70
→
80
→
90
→
100
Step 1: Start with the base number

Begin with 0 (the starting point for counting)

Step 2: Add 10 repeatedly

0 + 10 = 10, then 10 + 10 = 20, then 20 + 10 = 30, and so on

Step 3: Continue until reaching 100

Following the pattern: 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100

Step 4: Verify completeness

Check that we've included all multiples of 10 from 0 to 100

Complete sequence: 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100
Final answer:

The complete sequence counting by 10s from 0 to 100 is: 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100

Applied rules:

• Starting point: Begin with the specified base number (0)

• Consistent increment: Add the same value (10) at each step

• Range completion: Continue until reaching the target number (100)

0
No tens
→
10
1 ten
→
20
2 tens
→
30
3 tens
→
40
4 tens
→
50
5 tens
→
60
6 tens
→
70
7 tens
→
80
8 tens
→
90
9 tens
→
100
10 tens
Rules and methods, laws,...
10, 20, 30, 40, 50...
Skip Counting by Tens
Key definitions:

Counting by 10s: Adding 10 to each number to get the next number in the sequence

Skip counting: Counting forward by a number other than one

Tens place: In numbers like 20, 30, the first digit represents how many groups of ten

Complete methodology:
  1. Identify the starting number: Recognize where the sequence begins
  2. Recognize the pattern: Determine that we're adding 10 each time
  3. Apply the rule: Add 10 to the current number to get the next
  4. Continue the pattern: Repeat until reaching the target number
Tip 1: Remember that counting by 10s means each number ends in 0.
Tip 2: Think of tens as groups: 30 means 3 groups of ten.
Tip 3: Practice counting out loud to build fluency.
Tip 4: Use your fingers to count groups of ten.
Common errors: Forgetting the zero at the end, skipping numbers, counting by ones instead of tens.
Memory aid: The sequence of tens digits is just regular counting: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10.
Key facts to remember:

• Counting by 10s: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100

• Each number is 10 more than the previous number

• All numbers in the sequence end with a zero

• Counting by 10s helps with addition and subtraction

Questions & Answers

Question: Why do all the numbers in counting by 10s end with zero? It seems like a pattern but I don't understand why.

Answer: Great observation! This happens because of how our number system works:

  • When we count by 10s, we're adding groups of 10
  • One group of 10 is written as 10 (one ten and zero ones)
  • Two groups of 10 is 20 (two tens and zero ones)
  • Three groups of 10 is 30 (three tens and zero ones)

Each number shows how many groups of ten we have, followed by zero individual units. That's why every number in the sequence ends with 0!

Think of it like this: if you have 4 bags with 10 marbles each, you have 40 marbles total (4 tens and 0 extra marbles).

Question: My child struggles with skip counting by 10s after 50. They sometimes say 50, 60, 70, 90 and skip 80. How can I help them?

Answer: This is a very common challenge! Here are strategies to help:

  • Use physical objects like blocks or counters to group in tens
  • Create a hundreds chart and highlight the counting by 10s pattern
  • Practice the sequence slowly and repeatedly: "ten, twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety, one hundred"
  • Point out that after 50, the tens digits continue in order: 6, 7, 8, 9

Visual aids and hands-on activities work especially well for young learners. Consistent daily practice for just 5 minutes can make a big difference.

Tip: Make it fun with songs, chants, or games that emphasize the pattern!

Question: Can I count by 10s starting from a number that's not 0 or 10? Like starting from 5?

Answer: Yes, absolutely! You can count by 10s starting from any number. If you start from 5:

  • Start with 5
  • Add 10 to get 15
  • Add 10 to get 25
  • Add 10 to get 35
  • And so on: 5, 15, 25, 35, 45, 55, 65, 75, 85, 95

Notice that when you start from 5, all the numbers end in 5! This is because you keep adding 10 (which doesn't change the ones digit) to a number ending in 5.

You can start counting by 10s from any number: 1, 11, 21, 31... or 3, 13, 23, 33...