Practice Exercises:
Decide whether or not each of the following is a true statement (yes or no)
1. \(7+4 = 11\)
2. \(1-3 = 4\)
3. \(3 \times 5 = 15\)
4. \(4 \div 8 = \frac{1}{2}\)
Replace the letter \(x\) with the number that makes a true statement (since \(x\) looks a lot like the multiplication symbol, in algebra we usually replace "\(\times\)" with "\(\cdot\)").
5. \(9 + x = 13\)
6. \(4 \cdot x = 20\)
7. \(12 = 3 + x \cdot 3\)
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