Adding and subtracting and estimating by the 10,000

Adding

100

44,567+22,789=?

What is the sum?

What is 67356

200

16,284+58,261=?

What is the sum?

What is 74545

300

87,296+11,436=?

What is the sum?

What is 98732

400

47,658+23,611=?

What is the sum?

What is 71269

500

78,123+12,543=?

What is the sum?

What is 90666

Subtracting

100

99,999-66,789

What is 33210

200

75,063-63,374

What is 11689

300

89,606-42,785

What is 46821

400

98,009-78,975

What is 19034

500

86,735-75,886

What is 10849

Estimating Subtracting

100

Estamate 48,973-28,964

What is 20000

200

estimate 87,304-74,307

What is 20,000

300

estimate 85,465-12,946

What is 80,000

400

estimate 82,746-63,486

What is 900,000-60,000=30,000

500

estimate 84,768-6,537

What is 85,000-7,000=78,000

Estimating Addition

100

Estimate 45,274+997

What is 45,300+1,000=46,300

200

Estimate 73,576+11,999=

What is 70,000+10,000=80,000

300

Estimate

64,344+13,253

What is 60,000+10,000=70,000

400

Estimate.

93,369+3,674

What is 93,000+4,000=97,000

500

Estimate.

56,112+23,748=

What is 60,000+20,000=80,000

Rounding

100

Round this in the tens place

89,679

What is 89,680

200

Round in the hundreds place

988,926

What is 988,900

300

Round in the thousands place.

879,996

What is 880,000

400

Round the ten thousands place

72,745

What is 70,000

500

Round in the ten thousands place

97,695

What is 100,000