Small practice
brighter futures.
Checking sign-in status
Menu

Addition practice

Missing addends in different formats

Solve horizontal missing-addend equations with the sum on either side of the equals sign and either addend missing.

Ready-made English PDF · fixed settings

Worksheet · LetterWorksheet · A4
Customize worksheet ↓
With answer key

Customization below makes a separate PDF.

First page of the missing addends in different formats printable worksheetOpen full-size sample (first page)

Fixed English ready-made files. Custom settings below apply only to the configured PDF.

Ready to print

Start with a ready-made worksheet

Read the whole equation before calculating. Decide which value is missing, solve for it, and check the completed equation.

Download the practice pages alone, or include a separate answer key or teacher model. Longer activities may use more than one page.

US Letter

Student worksheetWorksheet with answers

A4

Student worksheetWorksheet with answers
Customize this worksheet

Paper sizes and printing help · More addition activities

Learning objective

What this activity builds

Find an unknown addend across multiple layouts without relying on a fixed visual position.

Worked example

Complete 45 = 26 + □.

19

Subtract the known addend from the sum: 45 − 26 = 19, and 26 + 19 = 45.

Teaching notes

Make the practice count

  • Rotate the paper or rewrite a vertical item horizontally when layout obscures the relationship.
  • Ask learners to state the inverse subtraction equation.

Make it yours

Customize the practice

Choose your options, update the preview, then download the exact same pages.

Worksheet settings

Equation formats
Page note and reproducible seed

The same settings and seed make the same questions. Shared links include your page note; leave personal information out.

Configured PDF · Missing Addends in Different Formats · US Letter

Preview ready. Download includes these exact pages.

1 student page
Enlarged pages scroll. PDF size stays the same.
Math SheetNameScore/ 20TeacherDateMissing Addends in Different FormatsUse the equal sign to find the missing addend in each format.1.28 = ____ + 112.14 + ____ = 383.73 = 34 + ____4.____ + 28 = 615.____ + 27 = 486.34 = ____ + 207.42 = 11 + ____8.73 = ____ + 369.35 = ____ + 1110.80 = 40 + ____11.____ + 34 = 7312.56 = ____ + 2113.____ + 23 = 3414.____ + 16 = 4115.58 = ____ + 2416.____ + 17 = 5017.50 = ____ + 2118.67 = ____ + 3119.64 = ____ + 2720.17 + ____ = 29math-sheet.comPage 1 / 1

A useful next step

Related activities

Printable missing-addend addition worksheet preview

Addition

Missing-addend addition

Find an unknown first or second addend in horizontal equations with selectable blank symbols.

Preview and download
Printable missing addends to multiples of ten worksheet preview

Addition

Missing addends to multiples of ten

Find the amount needed to reach 10, 100, or 1,000, including optional decimal variants for place-value reasoning.

Preview and download