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Which signs should be interchanged if the equation below needs to be true?
1.5 + 8 × 9 - 16 ÷ 2 = 4
1.5 + 8 × 9 - 16 ÷ 2 = 4
- A× and -
- B÷ and -
- C+ and ÷
- D- and +
Answer not set
Discussion 1
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CCommunity
Option 1) × and -
Given: 1.5 + 8 × 9 - 16 ÷ 2 = 4
After Sign Interchange : 1.5 + 8 - 9 × 16 ÷ 2 = 4 → 1.5 + 8 - 72 ≠ 4
Option 2) ÷ and -
Given: 1.5 + 8 × 9 - 16 ÷ 2 = 4
After Sign Interchange : 1.5 + 8 × 9 ÷ 16 - 2 = 4 → 1.5 + 4.5 - 2 = 4
Option 3) + and ÷
Given: 1.5 + 8 × 9 - 16 ÷ 2 = 4
After Sign Interchange : 1.5 ÷ 8 × 9 - 16 + 2 = 4 → 13.5 ÷ 8 - 16 + 2 ≠ 4
Option 4) - and +
Given: 1.5 + 8 × 9 - 16 ÷ 2 = 4
After Sign Interchange : 1.5 - 8 × 9 + 16 ÷ 2 = 7 → 1.5 - 72 + 8 ≠ 4
Hence, ÷ and - signs should be interchanged if the equation needs to be true.
Given: 1.5 + 8 × 9 - 16 ÷ 2 = 4
After Sign Interchange : 1.5 + 8 - 9 × 16 ÷ 2 = 4 → 1.5 + 8 - 72 ≠ 4
Option 2) ÷ and -
Given: 1.5 + 8 × 9 - 16 ÷ 2 = 4
After Sign Interchange : 1.5 + 8 × 9 ÷ 16 - 2 = 4 → 1.5 + 4.5 - 2 = 4
Option 3) + and ÷
Given: 1.5 + 8 × 9 - 16 ÷ 2 = 4
After Sign Interchange : 1.5 ÷ 8 × 9 - 16 + 2 = 4 → 13.5 ÷ 8 - 16 + 2 ≠ 4
Option 4) - and +
Given: 1.5 + 8 × 9 - 16 ÷ 2 = 4
After Sign Interchange : 1.5 - 8 × 9 + 16 ÷ 2 = 7 → 1.5 - 72 + 8 ≠ 4
Hence, ÷ and - signs should be interchanged if the equation needs to be true.