Adding Greater Numbers

Find the estimated sum of 54 720 and 9 571.

Round the numbers to the highest place value.

• 63 291

• 59 000

• 60 000

• 70 000

Estimate the sum:

2,764 + 4,851

• 7,000

• 6,000

• 5,000

• 8,000

What would be a good estimated sum for 4,423 + 1,784

• 4,000

• 5,000

• 6,000

• 7,000

The number of minor worker ants in two colonies are shown below.

· Colony A has 22,815 worker ants.

· Colony B has 5,144 worker ants.

Which of the following is the best estimate of the difference between the number of worker ants in these colonies?

• 18 worker ants

• 1,400 worker ants

• 18,000 worker ants

• 17,000 worker ants

Round to the nearest ten thousand, then estimate the sum.

65,447 + 124,557

• 80,000

• 170,000

• 180,000

• 190,000

Round to the nearest ten thousand, then estimate the difference:

887,167 - 342,208 =

• 500,000

• 554,000

• 545,959

• 550,000

Find the sum: 87,390+34,931=

• 122,321

• 112,321

• 112,221

• 122,421

72,283 + 25,928 equals to (a)  

• 173,018

• 89,273

• 98,211

• 72,374

28,384 + 19,283 = 46,667
Is this true or false?

• True

• False

What is 100 more than 24 725?

• 25 725

• 24 825

• 24 625