INPUT & OUTPUT

Discover the rule that transforms input numbers into output numbers.

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Section 1 / 3

WHAT IS A FUNCTION MACHINE?

A function machine takes a number in (input), applies a rule, and produces a number out (output). For example, Rule: +3 means every number that goes in gets 3 added. Input 5 > Output 8. Input 10 > Output 13.

Rule: +3. Input: 5 > Output: ?

1Apply the rule: 5 + 3 = 8

2Output = 8

= 8

Rule: ×2. Input: 7 > Output: ?

1Apply the rule: 7 × 2 = 14

= 14

LEADER TIP

Function machines! Numbers go in, a secret rule changes them, different numbers come out. Can you crack the code?

BEFORE THIS LESSON, TRY

Number Patterns

PRACTICE WITH THESE GAMES

Number Factory

Complete the Series

Find the Operation

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INPUT & OUTPUT

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INPUT & OUTPUT