Below is a function machine for adding fourteen.

$\editable{}$ | $+14$+14 | $\editable{}$ | ||

a

If we put $23$23 into the function machine, will we need to carry when we add the units?

Yes

A

No

B

b

If we put $17$17 into the function machine, will we need to carry when we add the units?

Yes

A

No

B

c

Which type of numbers will involve a carry when put into this function machine?

Numbers with a units digit from $0$0 to $5$5.

A

Numbers with a units digit of $3$3 only.

B

Numbers with a units digit from $6$6 to $9$9.

C

Numbers with a units digit of $7$7 only.

D

Easy

Approx 2 minutes

Below is a function machine for adding eighteen.

Below is a function machine for subtracting seventeen.

Below is an algorithm for adding two $2$2-digit numbers together.

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