Round each number to the nearest ten. Then estimate the sum.

2,995 + 407

The estimated sum is .

Round each number to the nearest hundred. Then estimate the sum.

1,950 + 2,149

The estimated sum is .

Round each number to the nearest ten. Then estimate the sum.

395 + 84

The estimated sum is .

Round each number to the nearest hundred. Then estimate the sum.

249 + 351

The estimated sum is .

Round each number to the nearest hundred. Then estimate the sum.

2,549 + 3,451

The estimated sum is .

Round each number to the nearest hundred. Then estimate the sum.

2,049 + 875

The estimated sum is .

Round each number to the nearest ten. Then estimate the sum.

47 + 86

The estimated sum is .

Round each number to the nearest hundred. Then estimate the sum.

349 + 152

The estimated sum is .

Round each number to the nearest hundred. Then estimate the sum.

648 + 1,270

The estimated sum is .

Round each number to the nearest ten. Then estimate the sum.

154 + 278

The estimated sum is .

Round each number to the nearest thousand. Then estimate the sum.

2,508 + 4,490

The estimated sum is .

Round each number to the nearest ten. Then estimate the sum.

1,206 + 783

The estimated sum is .

Round each number to the nearest hundred. Then estimate the sum.

3,049 + 1,651

The estimated sum is .

Round each number to the nearest ten. Then estimate the sum.

92 + 143

The estimated sum is .

Round each number to the nearest ten. Then estimate the sum.

364 + 527

The estimated sum is .

Round each number to the nearest ten. Then estimate the sum.

305 + 67

The estimated sum is .

Round each number to the nearest hundred. Then estimate the sum.

3,506 + 2,094

The estimated sum is .