Grade 1 Counting: Skip Counting by 10s

Worked examples

Real problems from the practice worksheets, solved one step at a time.

1. Example 1

   Count by 10s:

   30,40,50,60,70, , , 

   Fill in the missing numbers

   1. This is a counting pattern — each number changes by the same amount.
   2. The numbers go up by 10 each time (skip counting by 10).
   3. Add 10 to fill each blank. The missing numbers: 80, 90, 100.

   Answer: 80, 90, 100

2. Example 2

   Count by 10s:

   50,60, , ,90, ,110,120

   Fill in the missing numbers

   1. This is a counting pattern — each number changes by the same amount.
   2. The numbers go up by 10 each time (skip counting by 10).
   3. Add 10 to fill each blank. The missing numbers: 70, 80, 100.

   Answer: 70, 80, 100

3. Example 3

   Count by 10s:

   30,40,50, ,70,80, , 

   Fill in the missing numbers

   1. This is a counting pattern — each number changes by the same amount.
   2. The numbers go up by 10 each time (skip counting by 10).
   3. Add 10 to fill each blank. The missing numbers: 60, 90, 100.

   Answer: 60, 90, 100