1st Grade Counting and Numbers to 20 Worksheet (PDF)
This numbers to 20 worksheet for 1st Grade covers counting and numbers to 20 (Common Core 1.NBT.A.1), with a free PDF to print.
These 20 problems practice counting and reading numbers to 20, as in Common Core standard 1.NBT.A.1. Kids count stars and counters, use ten frames and number lines, and find one more and one less.
The problems start easy and get harder. The last six are short story problems. Count out loud and check each answer.
Grade 1 · Common Core State Standards: 1.NBT.A.1
Numbers to 20 worksheet: exercises 1 to 10
Exercise 1 – Count the stars
Count the stars. Write the numeral.
Exercise 2 – Count the ten frames
Count the counters in the ten frames. Write the numeral.
Exercise 3 – Numeral for a word
Write the numeral for the word nine.
Exercise 4 – Teen word to numeral
Write the numeral for the word sixteen.
Exercise 5 – Next number
Write the next number: \(8, 9, 10\), ___
Exercise 6 – Missing number in a row
Write the missing number: \(4, 5\), ___, \(7, 8\)
Exercise 7 – Hop right
A frog sits on \(16\) on a number line. It hops one step to the right. Where does it land?
Exercise 8 – Hop left
A rabbit sits on \(12\) on a number line. It hops one step to the left. Where does it land?
Exercise 9 – Number line gap
Write the number in the yellow box.
Exercise 10 – Count back
Count back. Write the missing number: \(12, 11\), ___, \(9\)
Exercises 11 and up
Exercise 11 – Fill the frame
How many more counters fill the ten frame?
Exercise 12 – Ten and some more
Write the numeral for ten and three more.
Exercise 13 – Count on three
Start at \(14\). Count on three numbers. Write them.
Exercise 14 – Missing end of the row
Write the missing numbers: \(15, 16\), ___, \(18, 19\), ___
Exercise 15 – Sticker book
Maya has \(17\) stickers. Her friend gives her one more. How many stickers does Maya have now?
Exercise 16 – Apple basket
Diego picks \(11\) apples. One apple falls out of the basket. How many apples are in the basket now?
Exercise 17 – Block towers
Liam builds one tower with ten blocks and another tower with five blocks. How many blocks does he have?
Exercise 18 – Shell collection
Priya finds \(9\) shells on Monday. She finds one more on Tuesday and one more on Wednesday. How many shells does she have after Wednesday?
Exercise 19 – Counting to twenty
Mei counts on from \(16\) to \(20\). Write all the numbers she says after 16.
Exercise 20 – Mystery number
Noah says: “My number is one less than \(20\).” What is Noah’s number?
Key facts behind this numbers to 20 worksheet
- Touch each object once and say one number for each touch.
- The last number you say tells how many objects there are.
- A full ten frame holds 10 counters; a second frame shows 11 to 20.
- One more is the next number; one less is the number before.
- A numeral such as 14 is the written symbol for fourteen.
How to use this numbers to 20 worksheet
Work through the exercises in order: they go from simple to challenging. Write every step on paper, then compare with the solutions page and redo any exercise you missed the next day.
All Grade 1 chapters: Grade 1 math.
