University:
Glendale Community College
Course:
MAT140 | College Mathematics
Academic year:

2022
Views:

260

Pages:

3
Author:

sifela5u

Section 1.7: Introduction to Decimals Chapter 1: Introduction to Algebra Each digit of a decimal corresponds to the place value based on powers of ten. How to write a number in decimal form: Step 1. Place the last digit in the given number in the desired decimal place. (see example below, I am not sure this is written so nicely) Step 3. Place any additional digits directly to the left of the number that was placed in step 2. Step 4. Fill in the rest of the decimal positions with 0’s. For example: Write 7 one-thousandth as a decimal. Step 1: Place the number 7 in the one-thousandth position: 0. __ __ _7_ Step 2: Fill in 0’s to the right of the decimal and to the left of the 7. Answer: 0.007 For example: Write 15 hundred-thousandth as a decimal. Step 1: Place the 5 in the hundred-thousandth position and write the 1 directly to the left of the 5. 0. __ __ __ _1_ _5_ Step 2: Fill in 0’s to the right of the decimal and to the left of the 1. Answer: 0.00015 Section 1.7: Introduction to Decimals Chapter 1: Introduction to Algebra Section 1.7: Introduction to Decimals Chapter 1: Introduction to Algebra Add or subtract decimals Step 1. Determine the sign of the sum or difference. Step 2. Write the numbers so the decimal points line up vertically. Step 3. Use zeros as placeholders, as needed. Step 4. Add or subtract the numbers as if they were whole numbers. Then place the decimal point in the answer under the decimal points in the given numbers. Step 5. Write the sum or difference with the appropriate sign.