Using function machines with a single operation to find outputs from inputs, and working backwards to find inputs.
Where your child meets this in real life: Understanding processes with inputs and outputs, like vending machines or recipes
SEAGReady breaks one-step function machines into 2 steps, taught in order so each skill builds on the last.
Find the output when given an input and a single operation in a function machine
Find the input when given an output and a single operation by working backwards using inverse operations
Three free sample questions from our one-step function machines course. Every question comes with a full explanation, and hints that guide without giving the answer away.
Charlotte puts 8 into the function machine shown. What output comes out?
The function machine gives the output shown. What number was put in?
Jamie's toy robot has a rule: multiply the number typed in by 6. He types in 9. What number does the robot display?
This is the exact interactive worked example your child sees in SEAGReady. Step through it and watch the method build up.
Emma is using a function machine. The machine takes a number, multiplies it by 4, and gives the output.
If she puts in 7, what number comes out?
7 → ×4 → ?
The input is 7
Step 1 of 3
Emma is using a function machine. The machine takes a number, multiplies it by 4, and gives the output.
If she puts in 7, what number comes out?
When Emma puts in 7, the machine gives 28.
The key insight: A function machine always does the same thing to any number you put in!
Common mix-up: 7 + 4 = 11. The operation is multiply (×4), not add (+4). Read the operation symbol carefully.
These are the misconceptions we see most often in one-step function machines, including the ones our practice questions are specifically designed to catch.
Struggling with one-step function machines? The real gap is often in one of these earlier topics.
SEAGReady finds the exact step where your child gets stuck, teaches it with worked examples like the one above, and brings it back for review so it sticks.
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