Rounding to the Nearest Ten
2-Digit Addition
Rounding to the Nearest Hundred
Three-Digit Addition
Vocabulary
100
What is 24 rounded to the nearest ten?

20

100

What is the sum of 52 + 58?

110

100

What is 356 rounded to the nearest hundred?

400

100

What is the sum of 356 ml + 148 ml?

504 ml

100

What math operation does the hint word "altogether" tell us that we need to use?

Addition

200

What is 45 rounded to the nearest ten?

50

200

What is the sum of 47 + 46?

93

200

What is 148 rounded to the nearest hundred?

100

200

What is the sum of 647 g + 146 g?

793 g

200

What does "sum" mean?

A sum is the answer to an addition equation.

300

What is 683 rounded to the nearest ten?

680

300

What is the sum of 61 + 53?

124

300

What is 780 rounded to the nearest hundred?

800

300

What is the sum of 361 minutes + 212 minutes?

573 minutes

300

When we have a three-digit number and need to round to the nearest ten, which place value do we look at to decide if we round up or down?

The ones place


For example, when 112 rounding to the nearest ten, the 2 in the ones place tells us if need to round up or down.

400

What is 958 rounded to the nearest ten?

960

400

What is the sum of 82 kg + 79 kg?

161 kg

400

What is 931 rounded to the nearest hundred?

900

400

What is the sum of 173 L + 619 L?

792 L

400

What does "estimate" mean?

When we estimate, we are usually rounding. The answer is not the exact answer but a close one.

500

What is 1,178 rounded to the nearest ten?

1,180

500

What is the sum of 38 minutes + 96 minutes?

134 minutes

500

What is 468 rounded to the nearest hundred?

500

500

What is the sum of 830 + 452?

1,282

500

What is an addend?

An addend is one of the numbers being added in an addition equation.