Читать книгу Algebra I All-in-One For Dummies - Mary Jane Sterling, Mary Sterling Jane - Страница 73

1 –11. Work on the braces first. Do the subtraction in the parentheses and add the result to 3. Multiply that sum by 3 and subtract the product from 6. In the last parentheses, find the difference. Then add the result from the braces to this last number.

2 5.932. 5.932 rounds up to 6, and .

3 6,642.

4 . Multiply each term in the parentheses by .

5 2. Use the commutative property to reverse the order of the middle two factors.

You will find more on operations involving fractions in Chapter 4.

6 5. The additive inverse of –5 is 5.

7 840.

8 . Multiply each term in the parentheses by 5.

9 6. The largest integer that is not bigger than is 6.

10 . Work under the radical first. Multiply those last three factors together. Then subtract the result from 25. Find the square root of the difference. Then add to the root. Multiply the two numbers in the denominator. And, finally, divide the numerator by the denominator.

11 4. Use the commutative property to reverse the order of the last two numbers.

12 7. is equal to 6.875. Because the 8 is greater than 5, you round up to the next-larger integer.

13 14. First, do the subtraction in the parentheses. Then subtract that result from 4. Finally, multiply by 2.

14 3. The multiplicative inverse of is 3. Multiply both terms by this number: