Let’s work through the problem step by step.
We are given two “Two Step Function Machines” — each machine takes a number, does one operation, then another, and gives a final answer.
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First Machine (Top Row):
Operations:
→ First box:
+21
→ Second box:
×2
So for any input number, we:
1. Add 21
2. Multiply the result by 2
Let’s calculate for each input:
11) Input = 7
7 + 21 = 28
28 × 2 =
56
12) Input = 13
13 + 21 = 34
34 × 2 =
68
13) Input = 22
22 + 21 = 43
43 × 2 =
86
14) Input = 19
19 + 21 = 40
40 × 2 =
80
15) Input = 27
27 + 21 = 48
48 × 2 =
96
✔ All checked.
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Second Machine (Bottom Row):
Operations:
→ First box:
+18
→ Second box:
-33
So for any input number, we:
1. Add 18
2. Subtract 33 from that result
Let’s calculate:
16) Input = 50
50 + 18 = 68
68 - 33 =
35
17) Input = 67
67 + 18 = 85
85 - 33 =
52
18) Input = 72
72 + 18 = 90
90 - 33 =
57
19) Input = 56
56 + 18 = 74
74 - 33 =
41
20) Input = 91
91 + 18 = 109
109 - 33 =
76
✔ All checked.
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Final Answers:
Top machine outputs (questions 11–15):
56, 68, 86, 80, 96
Bottom machine outputs (questions 16–20):
35, 52, 57, 41, 76
Final Answer:
56, 68, 86, 80, 96, 35, 52, 57, 41, 76
Parent Tip: Review the logic above to help your child master the concept of function machine worksheet.
