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Kindergarten–Grade 3 · free, no account

Number bonds: part, part, whole

The reasoning behind addition and subtraction facts rather than the facts themselves. The blank moves around — sometimes a part, sometimes the whole — so a child cannot answer by pattern alone.

  • The missing value rotates between both parts and the whole
  • No prompt repeats on the same sheet
  • 8 to 48 per page in framed answer boxes
  • Matching, numbered answer key
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Number Bonds

Grade 1 · easy

NameMaya
Date
Score

Solve each problem. Show your thinking when you need to.

1.___ + 2 = 8
2.___ + 1 = 2
3.4 + ___ = 8
4.2 + 1 = ___
5.1 + 2 = ___
6.1 + 3 = ___
7.2 + 2 = ___
8.1 + ___ = 3
9.___ + 2 = 5
10.___ + 2 = 4
11.3 + 3 = ___
12.5 + ___ = 9
13.___ + 6 = 8
14.1 + ___ = 2
15.3 + 1 = ___
16.5 + 5 = ___
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Real sample

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What’s on the sheet

  • Part–part–whole diagrams with one value missing
  • Bonds to 10, to 20, or to the grade's range by difficulty
  • Circles drawn large enough for a child to write inside
  • A matching answer key

What each difficulty means

Difficulty is a real change to the numbers or the layout, not a label.

Gentle start

Wholes within 10.

Just right

Wholes within 20.

Extra challenge

Wholes within 50 up to Grade 2, and within 100 above it.

Grades this covers

Tap a grade you can use for a page of everything a child that age can practise here.

One diagram, two operations

A number bond showing 10 at the top and 6 in one part is an addition question and a subtraction question at the same time: 6 plus what makes 10, and 10 take away 6. Children who have spent time with bonds tend to see subtraction as the missing-part question rather than as counting backwards, which is faster and less error-prone.

That is why bonds are worth practising separately rather than treating them as decoration on an addition sheet.

Bonds to ten are worth memorising

There are only six: 0 and 10, 1 and 9, 2 and 8, 3 and 7, 4 and 6, 5 and 5. Knowing them cold is what makes the make-ten strategy work for every fact that crosses ten. It is the highest-return set of facts in early arithmetic.

The gentle setting stays inside ten for exactly this reason. Do not rush past it.

Questions

What is a number bond?

A pair of parts that make a whole. Seeing 3 and 4 make 7 is what later makes 7 − 3 obvious.

Is the blank always in the same place?

No. It rotates between the first part, the second part and the whole.

More practice to try

Addition worksheets you can fill to the lineSubtraction worksheets, with or without borrowingMultiplication facts, at the range you chooseDivision worksheets that divide evenlyCompare the numbers: greater, less, or equalFill in the missing number in the sequence
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Also searched for: number bonds worksheets · number bonds to 10 worksheets · part part whole worksheets · number bond practice sheets printable · number bonds to 20 worksheet pdf · free number bond worksheets kindergarten

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