Multiplying and dividing decimal numbers

If you doubled 36.9, would it be more or less than 100?

• More than 100

• Less than 100

• Exactly 100

Estimate to the highest place value.

4.3 x 18.07 x 1.79

• 160

• 80

• 120

• 100

A piece of wood is 21.25 feet long. If I want to cut it into 4.2 feet sections, _^about how many sections will I have? 

• 5 sections
• .2 sections 
• 4 sections 
• 2.1 sections 

Lisa and her date spent $87.70. They want to leave a 20% tip. What amount would be reasonable for the tip?

• $20.00
• $10.00
• $25.00
• $31.00

5.7×8.3=
(round to the nearest tenth)

• 4.731
• 47.31
• 473.1
• 4731

29.6 x 80.1

• 2320

• 2400

• 2430

• 2340

James has saved up $2,497.95 last year. This year he saves 2.9 times as much as last year. Choose the most reasonable estimate for the amount of money James saves up this year.

• $6,000

• $7,500

• $4,000

• $5,000

What is the best estimate of 3.4 x 7.8?

• 2.4

• .24

• 0.024

• 24

ESTIMATE THE QUOTIENT

 $5,546\div6=$  

• 10

• 200

• 2

• 20