Adding with Scientific Notation

(2.3 x 10^-2)+(4.1 x 10^-2)=

• 6.4 x 10^-4

• 6.4 x 10^-2

• 6.4 x 10⁰

• .64 x 10^-1

Give the sum of (5.7 x 10^-7) + (3.23 x 10^-5)

• 1.193 x 10^-12

• 3.287 x 10^-5

• 3.317 x 10^-12

• 5.53 x 10^-2

What is the ONLY thing that matters when adding and subtracting numbers in scientific notation?

• That the exponents are different

• That the constants are the same

• That the exponents are the same

• That both constants are positive

Answer explanation

The ONLY thing that matters when adding and subtracting numbers in scientific notation is that the exponents are the same.

When adding and subtracting in scientific notation, what do you do with the constants?

• Make them the same

• Add/subtract them

• Keep them

• Multiply/divide them

Answer explanation

When adding and subtracting in scientific notation, you add or subtract the constants while keeping the exponents the same.

(6 × 10¹) + (9 × 10¹)

Mathematical Equivalence

ON

(7 × 10⁰) + (3 × 10¹)

Mathematical Equivalence

ON

(8.8 × 10²) + (3 × 10²)

Mathematical Equivalence

ON

(3.05 × 10²) + 64

Mathematical Equivalence

ON

When adding or subtracting with scientific notation, why is it important to have the same power of 10?

• It is not important

• It aligns the place values making it easier to solve

• you don't have to have the same power of ten

• actually you need to have the same first factor

Add the scientific notation:

(6.2 x 10²) + (9.7 x 10⁰)

• .6297 x 10²

• 6.297 x 10⁰

• 6.297 x 10³

• 6.297 x 10²