Number Sense
Round each number to the nearest ten, then give the rounded value: 780
780
Compute: 780+312
1092
Bernardo needs 474 mL of milk and 327 mL of water. How much milk and water does he need?
Bernardo needs 801 mL of milk and water.
Estimate the sum by rounding to the nearest hundred: 780+312
780+310=1090 OR 800+300=1100
Round each number to the nearest hundred, then give the rounded value: 1256
1300
Compute: 637+285
922
Bernardo has a 2000 mL carton of milk. After using 1039 mL in 3 batches, how much milk will be left?
961 mL of milk will be left.
Estimate the sum by rounding to the nearest thousand: 1256+3119
1000+3000=4000
What is the value of the digit 7 in 3726?
700
Compute: 2234+5615
7849
Neo scored 3726 points and Falcon scored 1893 points. How many more points did Neo score than Falcon?
Neo scored 1833 more pints than Falcon.
Estimate the difference by rounding to the nearest hundred: 687−213
700+200=900
Order these numbers from least to greatest: 1893, 3726, 839, 514
514, 839, 1893, 3726
Compute: 5221−2915
2306
The class goal is $7500. One class raised $2956 and another raised $3147. How much money was raised altogether?
$6103 has been raised altogether.
Estimate the difference by rounding to the nearest thousand: 4392−2987
4000-3000=1000
Explain whether 2915 is closer to 2900 or 3000. Show your thinking.
Answers may vary
Compute: 4392−2987
1405
If the class raised about $4000, about how much more do they need to reach their goal of $7500?
They need about $3500 more to reach their goal.
Without calculating exactly, if Neo’s scored 3726 points and Falcon scored 1893 points, was Neo's winning margin closer to 1000 or 2000 and explain why using rounding.
4000-2000= 2000