Numbers · Grade 2

Ten and One Hundred More or Less Worksheets

Change a group of ten or a group of one hundred. Explain any regrouping while keeping track of the value of every digit.

4 problemsAnswer key includedFree printableA4 & US Letter

Generate & print See the worked example

Change the value by ten or one hundred

In 346, the digits stand for three hundreds, four tens, and six ones. Adding one ten gives 356. Adding one hundred gives 446. The amount added matters: ten and one hundred are different-sized groups.

346 + 10 = 356; 346 − 10 = 336
346 + 100 = 446; 346 − 100 = 246

Use bundles or place-value blocks to show the change. Say the value of the group you add or remove before writing the new number.

Crossing a hundred needs regrouping

Ten more than 395 is 405. Nine tens and one more ten make ten tens, which can be regrouped as one hundred. Five ones remain. Both the hundreds and tens digits change, so a rule that says “only change one digit” is not always correct.

Ten less than 302 is 292. Regroup one hundred as ten tens, then remove one ten. Two hundreds, nine tens, and two ones remain. The ones still represent two.

Removing the only hundred

One hundred less than 146 is 46. There are no hundreds left, but the four tens and six ones remain. One hundred less than 100 is 0; write a zero rather than leaving the answer blank.

Reaching one thousand

One hundred more than 900 is 1000. Ten hundreds make one thousand. An answer can have four digits even though the starting number has three digits.

If the child adds one instead of ten: compare one loose object with a bundle of ten. If the child changes the wrong place, ask whether the instruction names a ten or a hundred and build that group before trying again.

Check with the opposite change

After finding 100 less than 572 is 472, add 100 to 472 to return to 572. Also check the direction: more must increase the number, and less must decrease it. Use the space under the answer for a labeled drawing or a short explanation.

About this practice

Each sheet has four original questions: one each for 10 more, 10 less, 100 more, and 100 less. Starting numbers range from 100 through 900, with answers from 0 through 1000. A particular set does not guarantee a regrouping case, zero, or 1000.

This is selected mental place-value practice. It does not assess arbitrary three-digit addition and subtraction or provide ready-made quantity pictures. Invite the child to explain mentally after using objects or drawings as needed.

Make a practice set

Choose what to print. Selecting both shows the answer key on screen and prints the questions followed by the answers.

Print materials

WorksheetAnswer keyPaper

After the practice

Ask which group changed and whether regrouping was needed. Reverse each change to check the original number.

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Change one ten and keep the ones the same.
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More about numbers · Grade 2 worksheets

Grade 2 selected skill connection: 2.NBT.B.8. See the Common Core grade guidance. This worksheet does not cover every requirement in the standard.