Why do kids learn 10 more and 10 less?

It shows that a 2-digit number is made of tens and ones. When children see that only the tens digit changes, they can add and subtract tens in their head without counting.

What grade is this 10 more, 10 less worksheet for?

It is written for grades 1–2 and matches Common Core standards 1.NBT.C.5, 2.NBT.B.8.

Can I get a different version of this 10 more, 10 less worksheet?

Yes. Use the free Mathify Kids test maker to make a new 10 more, 10 less worksheet with different numbers every time. You choose how many questions, and every version comes with its own answer key.

10 more 10 less worksheet

Forty questions: 10 more and 10 less, pieces of the hundreds chart, 100 more and 100 less, missing numbers, number patterns and six word problems.

Download the free 10 more, 10 less worksheet (PDF)

10 more, 10 less worksheet

PDF · US Letter · Grades 1–2 · 40 questions · answer key included

Download the PDF

What’s on the worksheet

40 questions on 10 more, 10 less, sized for US Letter paper
2 pages of questions plus an answer key on the last page
Written for grades 1–2, matching Common Core 1.NBT.C.5, 2.NBT.B.8
Name and date lines at the top, and room to show the work

Sample questions from this worksheet

10 more than 34 =
10 less than 75 =
Fill in the hundreds chart around 59.
100 more than 689 =
23, 33, ___, 53, ___
Ali has 10 fewer marbles than Ben. Ben has 90. How many marbles does Ali have?

Preview the worksheet and answer key

Make a new 10 more, 10 less worksheet

Need another page for extra practice, a retake or a second group in class? The free Mathify Kids test maker builds a fresh 10 more, 10 less worksheet with different numbers every time. Choose how many questions, print it with its own answer key, or let your child take it on screen and see the score straight away.

Make a new version

10 more, 10 less: a worked example (10 more than 34 and 10 less than 34)

Look at the tens digit of 34: it is 3.
10 more adds one ten: 3 tens become 4 tens, so the answer is 44.
10 less takes one ten away: 3 tens become 2 tens, so the answer is 24.
The ones digit, 4, stays the same both times.

How to use it at home and in class

At home

Keep a hundreds chart on the table for the first page. For each question, ask your child to put a finger on the number and move one square down for 10 more or one square up for 10 less. After a few, cover the chart and ask “which digit changes?” The answer is always the tens digit. Part D does the same with the hundreds digit. The 10 more 10 less lesson shows the hundreds chart pattern step by step. Ten problems a day works better than a whole sheet at once. Mark them together with the answer key, then ask your child to explain one they got wrong: finding the mistake themselves is where the learning happens.

In class

Use the first row as a warm-up, a full page for independent practice, or five questions as an exit ticket. For a retake or a second group, make a new version with the test maker so every child gets different numbers.

Mistakes to watch for

Changing the ones digit, so 10 more than 34 becomes 35.
Counting on 10 ones one at a time and losing count.
On the hundreds chart, going sideways for 10 more instead of one square down.
In Part D, changing the tens digit instead of the hundreds digit for 100 more.

What to practice before and after 10 more, 10 less

Before: tens and ones. If this sheet is a struggle, go back a step.
After: skip counting, once this one is mostly right.
Learn it first: the 10 more, 10 less lesson and the place value chart.