Front

What does it mean for numbers to be 'friendly' for estimation?

Back

Friendly numbers are numbers that are easy to work with mentally, often rounded to the nearest ten, hundred, or thousand, making calculations simpler.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

How can you estimate the quotient of 2700 ÷ 30?

Back

You can round 2700 to 2700 and 30 to 30, which gives an estimated quotient of 90.

Tags

CCSS.5.NBT.B.7

Front

What is the estimated quotient of 5400 ÷ 60 when using friendly numbers?

Back

Round 5400 to 5400 and 60 to 60, resulting in an estimated quotient of 90.

Tags

CCSS.5.NBT.B.7

Front

How do you estimate 4000 ÷ 20 using friendly numbers?

Back

Round 4000 to 4000 and 20 to 20, leading to an estimated quotient of 200.

Tags

CCSS.5.NBT.B.7

Front

What is the friendly estimation for 7200 ÷ 80?

Back

Round 7200 to 7200 and 80 to 80, giving an estimated quotient of 90.

Tags

CCSS.5.NBT.B.7

Front

How can you simplify the estimation of 810 ÷ 9?

Back

Round 810 to 810 and 9 to 9, resulting in an estimated quotient of 90.

Front

What is the importance of rounding in estimation?

Back

Rounding simplifies calculations, making it easier to perform mental math and quickly arrive at an approximate answer.

Front

What are some common friendly numbers to use for estimation?

Back

Common friendly numbers include multiples of 10, 100, and 1000, such as 10, 20, 50, 100, 200, etc.

Tags

CCSS.4.NBT.B.5

Front

How does estimation help in real-life applications?

Back

Estimation allows for quick calculations in budgeting, shopping, and other everyday situations where exact numbers are not necessary.

Front

What is the difference between exact calculations and estimations?

Back

Exact calculations provide precise answers, while estimations give approximate answers that are easier to compute mentally.