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Adding 1 Worksheets

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Addition problems that all add 1, within 20 or with two- and three-digit numbers, stacked or across. Answer key optional.

Problems

Up to 24 characters. The name is drawn on the sheet and nowhere else. It is not saved, and it is not in the file name.

Added on in addition, taken away in subtraction.

Regrouping
Layout
How many
Timed test
Answer key

The same number prints the same problems.

Style
Options: paper size
Paper
  • Free
  • No ads
  • US Letter or A4

Class set

One copy for every student: type the first names and get one PDF, with each name on that student's own pages. Every student's pages use the same settings.

Class lists are used only to draw the pages and are never saved.

Every student gets the same problems (the same Sheet number), so one answer key checks them all.

Addition WorksheetNameDateScore/ 30Add. Write each answer.Adding 1, numbers within 20 · 30 problems1.1+82.1+123.0+14.1+115.1+56.1+37.1+68.7+19.1+1010.1+411.1+112.1+913.1+214.9+115.1+316.1+417.1+818.1+119.1+520.1+221.1+1222.11+123.10+124.1+625.0+126.1+727.11+128.1+429.2+130.1+9Free at multiplicationcharts.appSheet 1

Updates as you choose. Print at 100% (actual size) so nothing is cut off.

About adding 1

The facts for adding 1 run from 1 + 0 = 1 to 1 + 12 = 13. The doubles fact is 1 + 1 = 2. On a ten frame, 1 needs 9 more to make 10: 1 + 9 = 10. Every fact turns around: 1 + 7 and 7 + 1 are both 8. One fact family: 1 + 7 = 8, 7 + 1 = 8, 8 – 1 = 7 and 8 – 7 = 1.

Three sheets to start with

An adding 1 worksheet with sums within 20, stacked

Within 20

Every problem adds 1, and every sum is 20 or less. Problem 1 on this sheet is 1 + 8 = 9.

An adding 1 worksheet with the facts 1 + 0 to 1 + 12, written across

1 + 0 to 1 + 12, across

Within 100 gives every fact from 1 + 0 to 1 + 12, here written across. Problem 1 is 1 + 8 = 9.

A worksheet adding 1 to two-digit numbers, stacked

Two-digit numbers

1 added to two-digit numbers, 20 problems. Problem 1 is 1 + 98 = 99.

How to use it

  1. 1 is already set under One number in every problem. Choose the numbers, regrouping, the layout and how many problems.
  2. Press Download PDF, or Print to print it straight away.
  3. Choose Yes under Answer key to add a second page with every answer, under the same sheet number.

Ink saver leaves out the colored fills, for a black-and-white printer or to use less ink.

More free math sheets: Math facts practice

Charts to print

Chart 1–12Up to 144Chart 1–10Up to 100Chart 1–15Up to 225Chart 1–20Up to 400Blank chartFill it inTimes table chartEvery table written outChart 1–100100 × 100, on 40 pagesHundreds chartCounting 1–100WorksheetsPractice problemsAddition and subtractionWorksheets and timed testsDivisionFacts and long divisionFact familiesTriangles and housesNumber bondsTo 5, 10, 20 or 100Flash cardsTimes tables 1 to 12Chart 1–25Up to 625Chart 1–30Up to 900Chart 1–50Up to 2500Skip countingBy 2s, 5s, 10s and more

Times tables

One sheet for each table from 2 to 12: the facts, then a practice column.

Questions and answers

What is on an adding 1 worksheet?

Addition problems that all add 1. At the preset, within 20, every sum is 20 or less. The problems come in a mixed order, with a score box at the top and the sheet number at the bottom.

How do I get every fact from 1 + 0 to 1 + 12?

Choose Within 100 under Numbers. The other number then runs from 0 to 12, so the sheet has every fact from 1 + 0 = 1 to 1 + 12 = 13.

Is 1 always the first number on an adding 1 sheet?

No. Each fact is printed either way round, as 1 + 7 or 7 + 1, since both make 8.

Can I add 1 to bigger numbers?

Yes. Choose Two-digit numbers or Three-digit numbers under Numbers, and 1 is added to a number of that size in every problem.

Can an adding 1 sheet have carrying?

Choose With under Regrouping for problems where a column adds up to 10 or more, as in 1 + 9 = 10, or Without for none. If the numbers chosen have no problem of that kind, the sheet says so and draws any.

Preview