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### Course: Staging content lifeboat>Unit 14

Lesson 29: Comparing decimals visually

# Comparing decimals visually

Sal compares 0.17 and 0.2 using grid diagrams.

## Want to join the conversation?

• so 0.2 is the same as 0.20 but not 0.02?
• Yes. You see, unlike integers, it doesn't make a difference if you add zeros after a digit that is on the right of the decimal point. So it makes a difference if we add zeros to 2, like if you add one zero, it becomes 20, if you add 2, 200, and so on, so forth. but if you add zeros to a number after the decimal point, it doesn't make a difference, so 0.2 would be equal to 0.20, and 0.200000000000. However, if you add zeros after the decimal point but before another real number as a digit, then, yes, it would be different, because if you compare 0.20 and 0.02, it would be like comparing 2 and 20.
• how far do decimals go
• search up how far Pi goes. Decimals can go up to infinity
• Why do we have decimals insted we could round
• I don't think we can round because doctors and scientists might need a very precise measurement for medicine or chemical. If they round the wrong measurement can kill the patient or ruin the experiment.
• so .6 and .60 are the same
• Correct, 0.6, 0.60, and 0.600 are all equivalent
• So basicliy, it's like fractions, right?
• Yes, it is based on fractions
• Which is greater: 0.7 or 0.770?
• 0.770 because the tenths are the same but there are more hundreths than 0.7
• witch is bigger 3.7 or 3.642
• easy, 3.7 because .6 is smaller than .7.
• so 0.2 is 0.20
• yepper