Estimate the sum by rounding to the nearest hundred.
345+234=
300+200=500
100
Estimate the product by rounding to the nearest hundred.
345x5=
300x5=1,500
100
A koala sleeps an average of 22 hours each day. About how many hours does a koala sleep in a year?
20x400=8,000
200
10.1-2.7=
7.4
200
23x12=
276
200
Estimate to the sum by rounding to the nearest hundred.
567+432=
600+400=1,000
200
Estimate the product by rounding to the nearest hundred.
576x7=
600x7=4,200
200
A prairie dog has an average of 9 babies per litter. If it has 17 litters in a season, about how many babies are produced?
10x20=200
300
3.59+8.39=
11.98
300
456x3=
1,368
300
Estimate the sum by rounding to the nearest hundred.
998+312=
1,000+300=1,300
300
Estimate the product by rounding to the nearest hundred.
913x4=
900x4=3,600
300
Golfers lose, on average, about 9 golf balls per round of play. About how many golf balls will an average golfer lose playing one round every day for one year?
10x400=4,000
400
13.56-9.22=
4.34
400
876x14=
12,264
400
Estimate the sum by rounding to the nearest hundred.
1,323+679=
1,300+700=2,000
400
Estimate the product by rounding to the nearest hundred.
1,232x2=
1,200x2=2,400
400
In one year, the people in France will save 3,921 trees by recycling paper. About how many trees will they save in 8 years?
4,000x10=40,000
500
213.45-174.89=
38.56
500
654x123=
80,442
500
Estimate the sum by rounding to the nearest hundred.
475+912+326=
500+900+300=1,700
500
Estimate the product by rounding to the nearest hundred.
1,174x12=
1,200x12=14,400
500
An opossum sleeps an average of 19 hours per day. how many hours does an opossum sleep during a 4-week period?