Discussion
Select the correct combination of mathematical signs that can sequentially replace the * signs and balance the given equation.
85 * 17 * 47 * 13 * 37 * 429
Answer: A
The signs are ÷, +, =, ×, − in order. With them the equation reads 85 ÷ 17 + 47 = 13 × 37 − 429. The left side is 85 ÷ 17 = 5, and 5 + 47 = 52. The right side is 13 × 37 = 481, and 481 − 429 = 52. Both sides are 52, so the equation is balanced.
\[ 85 \div 17 + 47 = 52 = 13 \times 37 - 429 \]
Trying the other sets in the same way, none of them makes the two sides equal, so only the first set balances the equation.
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