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Chapter 10: Problem 51

Subtract. $$ 0.99-1 $$

Short Answer

Expert verified
-0.01

Step by step solution

01

- Identify the Problem

The problem asks to subtract 1 from 0.99. This can be written as: 0.99 - 1
02

- Perform the Subtraction

Subtract 1 from 0.99. When subtracting a larger number (1) from a smaller number (0.99), we will get a negative result. 0.99 - 1 = -0.01

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

negative numbers
Negative numbers are numbers that represent a value less than zero. They are written with a minus sign in front of them, like -1 or -0.5. Negative numbers are used in various real-life scenarios, such as temperatures below freezing, depths below sea level, or financial debts.

When you subtract a larger number from a smaller number, you get a negative result. In the given exercise, you subtracted 1 from 0.99, resulting in -0.01. This happens because 0.99 is less than 1, so the result is a negative number.

If you think about it on a number line, you are moving from 0.99 to the left by 1 unit. This takes you past 0 into the negative side, landing on -0.01.
decimal subtraction
Decimal subtraction involves subtracting numbers that have decimal points. It's similar to whole number subtraction, but you must pay attention to the decimal places.

To subtract decimals:
  • Align the numbers by the decimal point.
  • Subtract from right to left, just as you would with whole numbers.
  • If necessary, borrow from the next left digit.
In the exercise, 0.99 has two decimal places and 1 has zero decimal places. To make the subtraction easier, you can think of 1 as 1.00. Align the numbers by the decimal points:
0.99
-1.00
Subtract each column. Since you can't subtract 0 from 9 directly, you need to borrow: 9 - 10 + 1 = -1. Similarly, 9 - 9 + 0 = 0. The result is -0.01.
basic mathematics
Basic mathematics covers the fundamental arithmetic operations: addition, subtraction, multiplication, and division. Being comfortable with these basics is essential for solving more complex problems.

Let's revisit the steps of subtraction here:
  • Identify the numbers involved.
  • Align the digits, considering decimal points for decimals.
  • Subtract from right to left, borrowing when necessary.
In this exercise, subtracting 0.99 from 1 involves understanding how to handle both whole numbers and decimals. Starting with smaller components helps you build a strong mathematical foundation.

Remember, basic mathematics often involves simple practices like borrowing and aligning numbers, which help in solving operations like the one given.

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