Scientific Notation Adding Subtraction

What is the correct result of adding 6.3 x 10^3 to 1.2 x 10^2 after aligning the exponents properly?

• 7,500

• 6,420

• 6,300

• 120

Tags

CCSS.8.EE.A.4

What is the correct scientific notation for the sum of (8.2 × 10^5) + (3.4 × 10^5)?

• 11.6 × 10^5

• 1.16 × 10^6

• 11.6 × 10^6

• 1.16 × 10^5

Tags

CCSS.8.EE.A.4

Give the sum of (2.6 x 10⁶) + (4.2 x 10⁶)

• 6.8 x 10⁶

• 6.8 x 10¹²

• 8.4 x 10⁶

• 3.2 x 10¹²

Tags

CCSS.8.EE.A.4

Give the sum of (8.7 x 10⁵) + (7.32 x 10⁷) in scientific notation

• 16.02 x 10⁷

• 7.407 x 10⁵

• 7.407 x 10⁷

• 1.602 x 10⁷

Tags

CCSS.8.EE.A.4

Give the difference of (7.2 x 10^-7) - (4.5 x 10^-7)

• 2.7 x 10^-7

• 2.7 x 10⁰

• 1.17 x 10^-7

• 3.3 x 10^-7

Tags

CCSS.8.EE.A.4

(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

Tags

CCSS.8.EE.A.4

Write the answer in scientific notation.
5 x 10⁸ -   3.4 x 10⁸  =

• 2.4 x 10⁸

• 2.4 x 10⁰

• 1.6 x 10⁰

• 1.6 x 10⁸

Tags

CCSS.8.EE.A.4

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

Tags

CCSS.8.EE.A.4

Give the difference of (6.4 x 10^-6) - (5.7 x 10^-7)

• 5.83 x 10^-6

• 7 x 10^-7

• 1.23 x 10^-13

• 1.3 x 10^-6

Tags

CCSS.8.EE.A.4

Subtract the within the scientific notation. 
(2 x 10³) - (1.9 x 10²)

• 81 x 10⁵

• 81 x 10³

• 81 x 10⁶

• 81 x 10⁴

Tags

CCSS.8.EE.A.4