Place Value
Adding Decimals
Subtracting Decimals
Estimation
Potable Potpourri
100
15,294,948 Ten Thousands
9
100
12.45+74.31
86.76
100
53.23-12.95
40.28
100
If the average household income for Gallup, NM is $43,087 and the average household income for Port Huron, MI is $34,885, about how much more do households in Gallup make than in Port Huron?
About $8,000
100
17.5 x 6
105
200
17.98467 Thousandths
4
200
145.83+63.27+21.08
230.18
200
453.192-34.26
418.932
200
If Bob makes $20,774 a year working for Wal-Mart and his wife makes $13,490 making jewelry, about how much do they make total?
About $33,000
200
Put in order from least to greatest 12.5; 12.43; 12.52; 12.401; 12.382
12.382<12.401<12.43<12.5<12.52
300
15,204,293.172 Ten Millions
5
300
153.872+.93+7.12
161.922
300
73.94-12.385
61.555
300
If Wayne's faucet drips 1 time a second, he wastes 2,082 gallons of water a year. About how much water total would he waste every year if he had 2 faucets that dripped that much?
About 4,000 gallons of water total
300
Please write a number using all 9 digits and be able to read it aloud
check whiteboards and answers
400
12,489,367.05 Hundred Thousands
4
400
23,394.284+.962
23,395.246
400
9,283.34-12.95
9,270.39
400
If 132,090 boys from Kenya work and don't go to school, and 119,990 girls work and don't go to school, about how many children in Kenya work and don't go to school altogether?
About 250,000 altogether
400
2,278,492,394,283 Round to the nearest trillion
2,000,000,000,000
500
12.854763 Millionths
3
500
1.945+448.473+.475
450.893
500
1-0.7364
0.2636
500
In Ghana, 303,912 boys work and don't go to school while 263,301 girls work and don't go to school. About how many more boys than girls work and don't go to school?
About 40,000 more boys than girls
500
.238 Write this number as a fraction
238/1000