Answer:
a) 21
b) 7
Explanation:
For a, use the number machine to get the output.
9 ×2 =18 +3 =21
For b, do the opposite and work backwards starting from the output.
17 -3 =14 ÷2 =7
a)21
b)7
9 times 2 =18 18+3=21
7 times 2 equals 14 plus 3 =17
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