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Circle each expression that is not equivalent to the expression in bold.

a. 16 × 29
29 sixteens 16 × (30 – 1) (15 – 1) × 29 (10 × 29) – (6 × 29)
b. 38 × 45
(38 + 40) × (38 + 5) (38 × 40) + (38 × 5) 45 × (40 + 2) 45 thiirty-eights
c. 74 × 59
74 × (50 + 9) 74 × (60 – 1) (74 × 5) + (74 × 9) 59 seventy-fours

1 Answer

4 votes

Final answer:

The question involves identifying non-equivalent mathematical expressions to a given expression. Expressions (15 - 1) × 29 and (10 × 29) - (6 × 29) are not equivalent to 16 × 29. Additionally, 74 × (60 - 1) is not equivalent to 74 × 59.

Step-by-step explanation:

The student's question is asking to identify which expressions are not equivalent to a given bolded expression in each scenario. Let's go through each part separately:

  1. 16 × 2929 sixteens: This is 16 times 29 which is the same.
  2. 16 × (30 – 1): Again, this is equivalent because (30 - 1) equals 29, yielding 16 times 29.
  3. (15 – 1) × 29: This is not equivalent because it results in (14 times 29) which is not the same as 16 times 29.
  4. (10 × 29) – (6 × 29): This simplifies to 16 times 29 minus 6 times 29, which is also not equivalent.

  5. 38 × 45
  6. (38 × 40) + (38 × 5): This is equivalent due to the distributive property, also known as multiplication over addition.
  7. 45 × (40 + 2): This is equivalent as (40 + 2) equals 42, so it simplifies to 45 times 38.
  8. 45 thirty-eights: This just refers to 45 times 38, which is equivalent.

  9. 74 × 59
  10. 74 × (50 + 9): This is equivalent because it simplifies to 74 times 59.
  11. 74 × (60 – 1): This is not equivalent, it would simplify to 74 times 59 minus 74, which is different.
  12. (74 × 5) + (74 × 9): This is equivalent based on the distributive property.
  13. 59 seventy-fours: This is equivalent as it represents 59 times 74.
User Roman Podpryatov
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