Math

• What is 25% of 80?

• 40
• 30
• 15
• 20

• What is 40% of 200?

• 80

• 60

• 100

• 120

• Find the percentage change, when a number is changed from 80 to 100.

• 15%
• 25%
• 40%
• 10%

Charlie bought a shirt for $40, but then it went on sale for 20% off. How much did he save?"

• $10
• $15
• $20
• $8

Lucy's bill increased from $50 to $60. By what percentage did the bill increase?"

• 10%
• 30%
• 50%
• 20%

What is the standard form of 0.0000006?

• 6 x 10^-7

• 6 x 10^-6

• 6 x 10^7

• 6 x 10^6

Write the number 0.000045 in standard form

• 0.00045
• 4.5 x 10^5
• 4.5 x 10^-4
• 4.5 x 10^-5

Write 5,600,000 in standard form

• 5.6 x 10^7
• 5.6 x 10^4
• 5.6 x 10^5
• 5.6 x 10^6

Calculate: 3 x 10^1 x 2 x 10^1

• 600
• 50
• 30
• 100

Write this in standard form: 2.631x10^3

• 2630
• 2631
• 26310
• 263