91Ó°ÊÓ

Adding positive and negative numbers might seem a bit tricky at first, but with a little practice, it becomes straightforward. When you add a positive number to a negative number, you essentially perform a subtraction. This is because a positive and a negative number tend to cancel each other out to some extent.

For example, when you add 5 and -10 (written as \(5 + (-10)\)), you actually subtract 10 from 5, giving you -5. Here are a few pointers to help you understand this better:

• Think of the positive number as moving to the right on a number line and the negative number as moving to the left.
• If the negative number is larger (in terms of absolute value) than the positive number, the result will be negative.
• If the positive number is larger, the result will be positive.

This process becomes more intuitive as you practice more problems, so don’t shy away from experimenting with different combinations of positive and negative numbers!

Expressing numbers in words is quite simple. When dealing with a mathematical expression, each number is first converted into its word form.

Take, for instance, the expression \(5 + (-10)\).

- The number \(5\) is written as 'five'. - The number \(-10\) is expressed as 'negative ten'.

Writing numbers in words can help you better understand and verbally express mathematical problems. It's also a useful skill in translating mathematical equations into everyday language.

To practice expressing numbers in words, try writing out various mathematical expressions in their entirety using words, and then read them aloud. You'll quickly feel more comfortable in converting back and forth between numbers and words.

Let's break down how to express mathematical operations in words, using our example of \(5 + (-10)\). This involves expressing each symbol and operation verbally. Here's how you go about it:

- The plus sign \((+)\) is read as 'plus' or 'add'.
- It indicates that two numbers or quantities are being combined. - In our expression, 'plus' links together 'five' and 'negative ten'.

By verbalizing each part of the operation, you build a better understanding of how the operation works and what it means in everyday language.
This skill proves especially useful in communicating math problems and solutions clearly to others.

• For subtraction, use 'minus'.
• For multiplication, use 'times' or 'multiplied by'.
• For division, use 'divided by'.

Practice saying these operations aloud, and soon it will feel more natural to you!