Estimate
45 × 98 ESTIMATE. OVERESTIMATE OR UNDERESTIMATE?
50x100 = 5000 over
40 × 70
2800
399 × 2
798
83 × 57
4731
7,291 × 308
2,245,628
194 × 46
200 x 50 = 10,000
11 × 103
11000
87,294 × 3
261882
96 × 24
2256
155 × 956
148,180
394 × 285
400 x 300 = 12000 OVER
240 × 100
24000
60,759 × 4
243,036
802 × 41
32882
1,907 × 218
415,726
22 × 221
20 x 200 = 4000 UNDER
____× 103 = 54,000
54
5,295 × 9
47,655
5,046 × 91
459186
5,280 x 987
5,211,360
Old Faithful erupts about 19 times in 1 day. Each eruption sprays about 6,050 gallons of water. About how many gallons of water does Old Faithful spray in 1 day?
20 x 6000 = 12,0000
188 × 1,000
188,000
An interstellar object travels 85,700 miles in 1 hour. How far does the object travel in 5 hours?
428,500
Your friend needs a trumpet for 12 months. She can rent a trumpet for $42 each month and pay a yearly fee of $25, or she can buy a trumpet for $550. Should she buy or rent the trumpet?
Rent is $529
Buying is $550
Renting is cheaper
70,460 x 137
9,653,020