How to Add Scientific Notation | 8.EE.A.4💗💚

What is the standard format for a number written in scientific notation?

• A factor multiplied by a power of 10, where the factor is between 0 and 1.

• A factor multiplied by a power of 10, where the factor is between 1 and 10.

• A factor multiplied by a power of 10, where the factor is any integer.

• A factor multiplied by a power of 10, where the factor is a decimal.

When adding numbers in scientific notation, why must the powers of 10 have the same exponent?

• To make the numbers easier to read.

• To ensure the decimal points align correctly.

• To combine them like algebraic terms with the same variable and exponent.

• To prevent errors in multiplication.

If you have a number in scientific notation, like 9.938 x 10^6, and you want to change the exponent to 10^7, how should you adjust the decimal part?

• Move the decimal one place to the right.

• Move the decimal one place to the left.

• Multiply the decimal part by 10.

• Divide the decimal part by 100.

The area of Europe is about 9.938 x 10^6 square kilometers, and the area of North America is about 2.4256 x 10^7 square kilometers. What is the approximate total area, in square kilometers, of Europe and North America combined?

• 3.4194 x 10^6

• 3.4194 x 10^7

• 1.23636 x 10^6

• 1.23636 x 10^7