Let’s solve each problem one by one. We’ll plug in the given number for the letter (variable) and then do the math.
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1. 6w – 8, if w = 6
Plug in 6 for w:
6 × 6 – 8 = 36 – 8 =
28
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2. 7n – 2, if n = 8
Plug in 8 for n:
7 × 8 – 2 = 56 – 2 =
54
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3. 5c – 3, if c = 7
Plug in 7 for c:
5 × 7 – 3 = 35 – 3 =
32
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4. 4r + 9, if r = 3
Plug in 3 for r:
4 × 3 + 9 = 12 + 9 =
21
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5. 8 + 3z, if z = 2
Plug in 2 for z:
8 + 3 × 2 = 8 + 6 =
14
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6. 15/d – 2, if d = 5
Plug in 5 for d:
15 ÷ 5 – 2 = 3 – 2 =
1
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7. 8c + 6, if c = 3
Plug in 3 for c:
8 × 3 + 6 = 24 + 6 =
30
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8. 7 + 3s, if s = 4
Plug in 4 for s:
7 + 3 × 4 = 7 + 12 =
19
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9. 9 – 2h, if h = 4
Plug in 4 for h:
9 – 2 × 4 = 9 – 8 =
1
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10. 19 – 21/h, if h = 3
Plug in 3 for h:
19 – (21 ÷ 3) = 19 – 7 =
12
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Final Answer:
28, 54, 32, 21, 14, 1, 30, 19, 1, 12
Parent Tip: Review the logic above to help your child master the concept of math expressions grade 4 worksheet.
