3.NBT.2 - Final Activity

Front

What is the result of 431 - 143?

Back

288

Front

Estimate the total time spent cooking if Mrs. Proctor cooks meatballs for 43 minutes and in sauce for 56 minutes.

Back

About 100 minutes. Round 43 down to 40 and 56 up to 60, then add.

Front

What digit makes the subtraction problem correct if the tens place is missing in the second number?

Back

6

Front

Is Lorelai's estimate of driving less than 1,200 miles correct if the rounded miles are greater?

Back

No, because the number of miles rounded is greater than her estimate.

Front

What is the expanded form of 321 + 256?

Back

300 + 200 + 20 + 50 + 1 + 6

Front

What is rounding?

Back

Rounding is adjusting a number to the nearest place value to make it simpler to work with.

Front

What is the purpose of estimating in math?

Back

Estimating helps to quickly find an approximate answer without calculating the exact value.

Front

What does the term 'expanded form' mean?

Back

Expanded form is a way to write numbers by showing the value of each digit.

Front

How do you round 43 to the nearest ten?

Back

Round 43 down to 40 because it is closer to 40 than to 50.

Front

How do you round 56 to the nearest ten?

Back

Round 56 up to 60 because it is closer to 60 than to 50.