Mastering Scientific Notation and Significant Figures

What part of a number in scientific notation do we focus on to determine significant figures?

• The whole number

• The base

• The mantissa

• The exponent

How many significant figures are in the number 5.42 x 10^19?

• Two

• Three

• Five

• Four

In the number 7.100 x 10^-8, why are the zeros considered significant?

• Because they are to the left of the decimal

• Because they are to the right of a non-zero digit

• Because they are to the right of the decimal

• Because they are in the exponent

When dividing 2.0 x 10^12 by 8.330 x 10^8, what is the first step?

• Divide the mantissas

• Multiply the mantissas

• Divide the exponents

• Subtract the exponents

How do you handle significant figures when dividing 2.0 by 8.330?

• Round to the higher number of significant figures

• Round to the lower number of significant figures

• Ignore significant figures

• Add the significant figures

What do you do with the exponents when dividing 10^12 by 10^8?

• Add the exponents

• Subtract the exponents

• Multiply the exponents

• Divide the exponents

In scientific notation, how should the final answer be formatted?

• With one digit before the decimal

• With two digits before the decimal

• With three digits before the decimal

• With no digits before the decimal

When adding numbers in scientific notation, what must be true about the powers of ten?

• They must be subtracted

• They must be added together

• They must be the same

• They must be different

How do you determine where to round when adding 2.113 and 9.2 in scientific notation?

• Round to the number with the fewest decimal places

• Round to the nearest whole number

• Round to the number with the most decimal places

• Do not round

What happens to the exponent when you move the decimal place to the left in scientific notation?

• The exponent increases

• The exponent is divided by two

• The exponent decreases

• The exponent stays the same