Estimate the sum.

Round to the nearest ten to estimate the sum.
56 + 22 = ______

• 80
• 70

Round to the nearest hundred to estimate the sum.
324 + 182 = ______

• 500
• 400

Round to the nearest hundred to estimate the sum.
125 + 652 = ______

• 700
• 800

Round to the nearest hundred to estimate the sum.
227 + 435 = ______

• 600
• 700

Round to the nearest hundred to estimate the sum.
153 + 726 = ______

• 800
• 900