Estimating the sum

What is the estimated sum of

75 + 34?

• 100

• 110

• 120

What is the estimated sum of

23 + 35 + 18?

• 80

• 90

• 100

What is the estimated sum of

45 + 14 + 28 + 52?

• 120

• 130

• 140

What is the estimated sum of

238 + 264?

• 400

• 500

• 600

What is the estimated sum of

490 + 256 + 445?

• 1,100

• 1,200

• 1,300

What is the estimated sum of

6,789 + 3,197?

• 10,000

• 9,000

• 8,000

What is the estimated sum of

473 + 78?

• 570

• 560

• 550

What is the estimated sum of

816 + 54?

• 870

• 860

• 850

What is the estimated sum of

275 + 2,319?

• 2,500

• 2,600

• 2,700

What is the estimated sum of

7,964 + 573?

• 8,400

• 8,500

• 8,600