Estimation Challenge

Froggy Jumps

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About this activity

Quick estimation practice

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Hintonshin Xamphiasis

Zambia

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1	ej June 21, 2026	% 85	15:09
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Estimation Challenge


Froggy Jumps Estimation ChallengeOnline version Quick estimation practice by Hintonshin Xamphiasis 1 Estimate the product: 48 × 53 using rounding to the nearest ten. a about 2,500 b about 1,200 c about 3,000 2 If a bag weighs 1.79 kg and you round to the nearest 0.5 kg, what is the approximate weight? a 1.5 kg b 2.0 kg c 1.0 kg 3 Round 364 to the nearest hundred. a 400 b 300 c 360 4 Estimate the sum: 437 + 689 by rounding each to the nearest ten. a about 1,000 b about 1,200 c about 1,120 5 A rectangle is 28 cm by 17 cm. Estimate its area by rounding sides to tens. a about 700 cm² b about 450 cm² c about 500 cm² 6 If you have 0.76 and 0.53, estimate the sum by rounding to one decimal place. a 1.6 b 1.3 c 1.1 7 Round 0.045 to the nearest hundredth. a 0.05 b 0.04 c 0.045 8 Estimate the quotient: 123 ÷ 5 by rounding the numerator. a about 40 b about 25 c about 15 9 A marathon is ~42.195 km. Give a rough estimate to the nearest kilometer. a 42 km b 40 km c 45 km 10 If 2.6 × 3.4 is estimated by rounding, what is the approximate product? a about 6 b about 9 c about 12 11 If you start at 8 and move 5 units left, where do you land on the number line? a 3 b -13 c -3 12 A debt of 7 dollars is added to a balance of -12 dollars. What is the new balance? a -5 b -7 c -19 13 You gain 9 points but lose 15 points. What is your net score? a 24 b -6 c 6 14 A submarine is at depth -40 meters. It ascends 15 meters. What is the new depth? a -25 b -45 c -55 15 If temperature drops by 8 degrees from 2 degrees, what's the new temperature? a -6 b 2 c 10 16 Two friends owe you 11 dollars and you repay 5 dollars. Net change in what you owe others? a You now are owed 6 dollars b You owe 6 dollars c You owe 16 dollars 17 A elevator goes down 12 floors from the 0 floor. Which floor is it at? a 12 b 0 c -12 18 You multiply a negative by a positive: -3 × 4. What's the product? a -12 b 12 c -7 19 A stock goes down 20% from a value of 50. What is the new value (in dollars)? a 60 b 40 c -30 20 On a map, -9 hours is the same as what time offset before midnight? a 0 hours b 9 hours after c 9 hours before

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Estimation Challenge

Froggy Jumps

About this activity

Created by

Download the paper version to play

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Estimation ChallengeOnline version

by Hintonshin Xamphiasis

Estimate the product: 48 × 53 using rounding to the nearest ten.

If a bag weighs 1.79 kg and you round to the nearest 0.5 kg, what is the approximate weight?

Round 364 to the nearest hundred.

Estimate the sum: 437 + 689 by rounding each to the nearest ten.

A rectangle is 28 cm by 17 cm. Estimate its area by rounding sides to tens.

If you have 0.76 and 0.53, estimate the sum by rounding to one decimal place.

Round 0.045 to the nearest hundredth.

Estimate the quotient: 123 ÷ 5 by rounding the numerator.

A marathon is ~42.195 km. Give a rough estimate to the nearest kilometer.

If 2.6 × 3.4 is estimated by rounding, what is the approximate product?

If you start at 8 and move 5 units left, where do you land on the number line?

A debt of 7 dollars is added to a balance of -12 dollars. What is the new balance?

You gain 9 points but lose 15 points. What is your net score?

A submarine is at depth -40 meters. It ascends 15 meters. What is the new depth?

If temperature drops by 8 degrees from 2 degrees, what's the new temperature?

Two friends owe you 11 dollars and you repay 5 dollars. Net change in what you owe others?

A elevator goes down 12 floors from the 0 floor. Which floor is it at?

You multiply a negative by a positive: -3 × 4. What's the product?

A stock goes down 20% from a value of 50. What is the new value (in dollars)?

On a map, -9 hours is the same as what time offset before midnight?