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Chapter 1: Problem 21

Find each sum without the use of a number line. $$-9+4$$

Short Answer

Expert verified
-5

Step by step solution

01

Identify the Numbers

The numbers mentioned in the problem are -9 and 4. The number -9 is a negative number while 4 is a positive number.
02

Apply Rule of Adding Positive Number to Negative Number

When adding a positive number to a negative number, one must subtract the positive number from the absolute value of the negative number. So, start by converting -9 to its absolute value, which is 9. Then subtract 4 from 9.
03

Perform the Operation

Subtracting 4 from 9 results in 5. However, remember that the original number was negative. Therefore, when adding -9 and 4, the result should also be negative.
04

Conclusion

Therefore, -9 + 4 = -5

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Most popular questions from this chapter

Simplify each series of additions and subtractions. $$-23-11-(-7)+(-25)$$

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Find the value of each expression. $$\frac{9}{10}-\left(\frac{1}{4}-\frac{7}{10}\right)$$

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Simplify each series of additions and subtractions. $$-\frac{1}{2}-\frac{2}{3}-\left(-\frac{1}{3}\right)$$
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