Skip Counting Introduction — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. What is the missing number: 60, 70, ___, 90?
A) 80
B) 75
C) 85
D) 100
Seventy plus ten equals eighty, fitting between seventy and ninety in our count.
2. Which is the best way to count 5 groups of 2 stars?
A) Count by 10s
B) Count by 2s
C) Count by 5s
D) Count by 100s
Counting by twos fits because each group has two stars, making it fast and easy.
3. How many tens are in 100 when skip counting?
A) 8 tens
B) 9 tens
C) 10 tens
D) 11 tens
Ten, twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety, one hundred is ten tens.
4. Which list shows skip counting by 10s correctly?
A) 10, 11, 12, 13
B) 5, 10, 15, 20
C) 2, 4, 6, 8
D) 20, 30, 40, 50
Twenty, thirty, forty, fifty each grow by ten, so this is correct skip counting by tens.
Part B: Fill in the Blank
Write the correct answer on each line.
1. 20, 30, 40, 50
Thirty plus ten equals forty, fitting between thirty and fifty in our count.
2. 60, 70, 80, 90
Sixty plus ten equals seventy, which fits between sixty and eighty perfectly.
3. 20, 30, 40, 50
Going back ten from thirty gives twenty, which fits the skip counting pattern.
4. 80, 90, 100,
Ninety plus ten equals one hundred, the next number when skip counting by tens.
5. 10, 20, 30, 40
Thirty plus ten equals forty, the next number when skip counting by tens.