Write a number sentence for the problem
Joey has 48 markers, twelve of them are red. How many crayons are colors other then red?
36 crayons
100
solve
67 + 238
305
100
solve
1,789- 456
133
200
Use front end estimation
2,954
2,900
200
write a number sentence for the problem.
Bobby read a 735 page novel in five days. he read the first 380 pages in three days. How many pages did he read the other two days?
355 pages
200
solve
127 + 928
1,055
200
solve
530 - 282
248
300
Use reference Point estimation to estimate the closest number
1,763
1,750
300
find the sum or difference.
Mr. Jones bought 10 pounds of hamburger, 12 pounds of hot dogs and 6 pounds of chicken for a company cookout. How many pounds of meat did he buy?
28 pounds
300
solve
405 + 796
1,201
300
solve
756 -689
67
400
Use reference point estimation
2,118
2,100
400
find the sum of difference.
Sam read for 1 hour and 16 minutes in the morning and then again for 1 hour and 14 minutes in the evening. How much time did Sam spend reading in all?
2 hours and 30 minutes
2.5 hours
400
solve
1,763 + 2,118
3881
400
solve
4,882 - 1,764
3118
500
round this number to the nearest tens place
238
240
500
find the sum or difference
George ran one mile in 11 minutes and 23 seconds. Kelly ran one mile in 9 minutes and 15 seconds. Ho much faster was Kelly then George, (minutes and seconds)