Rounding
Round 7 to the nearest tens place
10
Estimate the sum
19 + 8
30
Estimate the difference
22 - 11
10
During a meteor shower John saw 7 meteors and Fran saw 12. About how many shooting stars did they see all together?
About 20
Round 19 to the nearest tens place
20
Estimate the sum
42 + 11
50
Estimate the difference
34 - 12
20
Mrs. Hoover's class raised two groups of silkworms. In one group, 17 silkworms turned into moths. In the other group, 9 silkworms turned into moths. In total, about how many silkworms turned into moths?
About 30 silkworms
Round 125 to the nearest tens place
120
Estimate the sum
71 + 49
120
Estimate the difference
50 - 37
10
To fill an order, the factory dyed 16 yards of silk pink and 51 yards yellow. About how many more yards of yellow silk did it dye than pink?
About 30 more yards
400
Estimate the sum
190 + 110
300
Estimate the difference
105 - 32
70
Samuel spilled a bag of nuts, and a group of dogs ate all of them. The biggest dog ate 69 nuts, and the other dogs ate the other 35 nuts. About how many nuts did Samuel spill?
About 110 nuts
Round 95 to the nearest tens place
100
Estimate the sum
499 + 79
580
Estimate the difference
470 - 280
200
Shelley jumped on the couch 52 times, and her friend Kate jumped on it 86 times. Then, the couch broke and they both got in big trouble. About how many more times did Kate jump on the couch than Shelley?
About 40 more times