Skill: Recognize number bonds to 5

Explanation and Free Practice Resources

A number bond to 5 represents the part–whole relationship in which two whole-number parts combine to make 5: 0 and 5, 1 and 4, or 2 and 3, including the reversed order. This understanding connects addition facts with related subtraction facts and supports flexible composition and decomposition of quantities; it is limited to these whole-number relationships, not generalized bonds for larger numbers or algebraic forms.

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Detailed Explanation: Recognize number bonds to 5

A number bond to 5 shows two parts that join to make 5.

The pairs are:

$0$ and $5$
$1$ and $4$
$2$ and $3$

The order can be reversed. For example, $3$ and $2$ also make $5$ .

Example:

3+\Box=5

Start with $3$ .
Count up until you reach $5$ : $4, 5$ .
You counted $2$ numbers, so the missing part is $2$ .

Therefore,

3+2=5

The number bond is $3$ and $2$ . These parts can also be written in reverse:

2+3=5

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Addition - Whole Number - Number Bonds to 5

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