Significant figures and scientific notation

How many significant figures does the following number have: 0.998005

• 9
• 10
• 6
• 5

Tags

CCSS.8.EE.A.4

Multiply:
(3.4 x 10⁵)(1.2 x 10^-3)

• 4.08 x 10³
• 4.8 x 10²
• 4.08 x 10²
• 4.08 x 10¹

Divide:
(6.9 x 10⁷) / (2.3 x 10^-3)

• 3 x 10¹⁰
• 3 x 10⁴
• 3 x 10⁵
• 3 x 10¹¹

Tags

CCSS.8.EE.A.4

Write the answer in scientific notation.
7.3 x 10⁵  +   3.7 x 10⁵  =

• 11.0 x 10⁵
• 1.1 x 10¹⁰
• 1.1 x 10¹¹
• 1.1 x 10 ⁶

Write the answer in scientific notation.
4.1 x 10⁵ +   5.5 x 10⁶  =

• 5.91 x 10⁶
• 9.6 x 10⁵
• 9.6 x 10¹¹
• 4.65 x 10⁵

Tags

CCSS.8.EE.A.4

Cell A=4.2 x 10^-4 
Cell B=2.1 x 10^-5 
Cell C=8.4 x 10^-4

Cell C is ___ larger than cell A.

• 2 times
• 20 times
• .2 times
• 4 times

Tags

CCSS.8.EE.A.4

How many significant figures does the following number have: 0.002040

• 6
• 4
• 3
• 2

Tags

CCSS.8.EE.A.4

How many significant figures does the following number have: 100.00210

• 7
• 5
• 10
• 8

Tags

CCSS.8.EE.A.4

Calculate 1.23 m x 0.89 m and give your answer with the appropriate number of significant figures.

• 1.0 m²
• 1.1 m²
• 1.0947 m²
• 1.09 m²

Calculate 5.50 cm + 5.50 cm and give your answer with the appropriate number of significant figures.

• 11 cm

• 11.0 cm

• 11.00 cm

• 11.000 cm