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Counting to 120

Counting up to 120 from any number, and reading and writing the numbers. Your child fills in missing numbers in counts, on number lines and on chart pieces.

Make a sheetDownload PDFThe PDF has this sheet, its answer key and a guide for grown-ups.

How to help

Say the numbers aloud from the last one you know. After a 9 in the ones place, the tens go up by one and the ones start again at 0: 49, 50.

Watch for: Skipping the change of tens: 48, 49, 40. Writing 110 as 10010, or 104 as 1004. Writing a number backwards, like 71 for 17.

At home: Count cereal pieces or steps past 100 together. Start somewhere new each time, like 87 or 106.

Sample sheet and answer key

Freddie's Frog Pond

Grade 1 · Counting to 120 · 1.NBT.A.1

NameDate

Freddie the frog lives in a busy pond full of bugs, lily pads and friends. Solve each problem to help Freddie out!

Keep counting

Fill in the missing numbers.

83,84,,,87,35,,,38,39,65,,67,,,7059,,61,,,6455,54,,,,50

Number line

Write the missing numbers.

80858687888990

Chart pieces

These pieces come from a chart that goes all the way to 120.

56766549
Mathness! Math Worksheets · © 2026 Zubin KhavarianCode 1NBTA1-PO-FIRST at mathness.app
Sheet

Freddie's Frog Pond

Grade 1 · Counting to 120 · 1.NBT.A.1

Answer key

Freddie the frog lives in a busy pond full of bugs, lily pads and friends. Solve each problem to help Freddie out!

Keep counting

Fill in the missing numbers.

83,84,85,86,87,8835,36,37,38,39,4065,66,67,68,69,7059,60,61,62,63,6455,54,53,52,51,50

Number line

Write the missing numbers.

8081828384858687888990

Chart pieces

These pieces come from a chart that goes all the way to 120.

5657656676777887545565754958596069
Mathness! Math Worksheets · © 2026 Zubin KhavarianCode 1NBTA1-PO-FIRST at mathness.appAnswer key
Answer key

New problems every time, three levels (gentle, core and stretch), themes to pick from, a second page if you want one. Each sheet comes with an answer key and a one-page guide for grown-ups.

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Standard

Common Core 1.NBT.A.1 · Count to 120 from any number, and read and write the numerals.

Also: Maryland 2025 1.NOS.A.1 · Texas TEKS 1.5A · Florida B.E.S.T. MA.1.NSO.1.1 · Virginia SOL 1.NS.1

Drill sheets for more practice

More grade 1 sheets: place value