Adding and Subtracting Rational Expressions

This video tutorial covers the fundamentals of decimals, including the base-10 system and place values. It explains how to write decimals in standard, expanded, and word forms, and provides methods for comparing, ordering, and rounding decimals. The tutorial also includes practical examples and exercises to reinforce understanding.

What does the decimal point separate in a number?

• Hundreds from thousands

• Whole number part from the fractional part

• Tenths from hundredths

• Ones from tens

How would you write '16 and 5 tenths' in standard form?

• 16.005

• 16.5

• 16.50

• 16.05

Which of the following is the correct standard form for '3 and 60 hundredths'?

• 3.006

• 3.06

• 3.6

• 3.60

How do you compare decimals effectively?

• By comparing the digits from left to right without aligning

• By aligning the decimal points and adding zeros if necessary

• By converting them to fractions first

• By comparing the whole numbers only

Which symbol would you use to compare 1.700 and 0.932?

• <

• >

• =

• ≤

What is the correct order from least to greatest for the decimals 0.8, 0.15, and 0.7?

• 0.15, 0.8, 0.7

• 0.8, 0.15, 0.7

• 0.15, 0.7, 0.8

• 0.7, 0.8, 0.15

Which of the following is the greatest: 7.04, 7.007, or 7.09?

• They are all equal

• 7.007

• 7.09

• 7.04

When rounding 0.157 to the nearest tenth, what is the result?

• 0.1

• 0.2

• 0.15

• 0.16

If you round 1.3333 to the nearest hundredth, what do you get?

• 1.35

• 1.3

• 1.34

• 1.33

What is the atomic weight of iron rounded to the nearest hundredth if it is 55.845?

• 55.90

• 55.80

• 55.85

• 55.84