ESTIMATION. SUMS AND DIFFERENCES

Listen and pick the right number.

• 5,273

• 5,237

• 523

• 5,327

Listen and pick the right number.

• 9,223

• 912

• 9,123

• 9,132

Listen and pick the right number.

• 1,458

• 1,558

• 158

• 1,448

Listen and pick the right number.

• 3,665

• 356

• 3,655

• 3,565

Listen and pick the correct number.

• 8,264

• 8,346

• 824

• 8,426

Estimate sums to the nearest 10.

• 790 + 260 = 1060

• 770 + 260 = 1030

• 780 + 270 = 1050

Estimate sums to the nearest 10.

• 940 + 870 = 1,810

• 930 + 870 = 1,800

• 940 + 850 = 1,790

Estimate sums to the nearest 10.

• 280 + 840 = 1,120

• 290 + 850 = 1,140

• 290 + 840 = 1,130

Estimate sums to the nearest 10.

• 500 + 340 = 840

• 500 + 350 = 850

• 490 + 340 = 830

Estimate differences to the nearest 100 (hundred).

• 2200 - 800 = 3000

• 2100 - 800 = 1300

• 2100 - 700 = 1400