Grade 5 Revision Estimation

What happens if it does not tell you which number to round to?

• Round to the smallest place value

• Round to the largest place value

• Pick a place value number and just round it

• I have no idea what to do! Help!

Round: 1,789,567

• 1,789,600

• 1,000,000

• 2,000,000

• 1,800,000

If I have 58 gummy bears, and then I eat 20 --- ABOUT how many gummy bears do I have left?

• 38 gummy bears

• 40 gummy bears

• I don't know because I am sure you ate more than 20.

• 80 gummy bears

When you see the word ABOUT in math, you know to . . . ?

• Add

• Subtract

• Estimate

• Product

When you estimate, are you looking for the exact amount or a reasonable amount?

• reasonable amount
• specific amount
• approximate amount
• exact amount

Round to the nearest thousand, then estimate the sum:

2,764 + 4,851

• 8,000
• 5,000
• 6,000
• 7,000

Estimate to find the product of 395 x 4

• 1000
• 1600
• 1200
• 1500

Estimate to find the product of 39 x 68

• 2500
• 3000
• 3500
• 2800

Estimate the quotient: 1,769 ÷ 23

• 100

• 95
• 85
• 80

A scientist counted 3,921 total eggs in 49 sea turtle nests. There were about the same number of eggs in each nest. Which is a reasonable estimate of the number of eggs she counted in each nest?

• 100 eggs

• 60 eggs

• 120 eggs

• 80 eggs