Does this question ask for an estimate or an exact answer?: About how many students are in the fourth grade?
Estimate (About how many...)
200
Solve 81 - 67 using the Make a Ten Strategy
14
200
Use front-end estimation to estimate 56,739 - 29,003.
30,000
200
687,391 - 439,382
248,009
200
3,006- 2,383
623
200
Does this question ask for an exact answer or an estimate?: If Shannon pays for her lunch with a $5.00 bill, exactly how much change will she get back?
Exact (exactly how much...)
300
Solve 266 + 712 using the Break Apart Strategy
978
300
Use rounding to estimate 873,901 - 410,391.
500,000
300
743,102 + 193,929
937,031
300
90,008- 49,381
40,627
300
15,930 people attended the Yankee game. 12,930 people attended the Red Sox game. About how many people attended both games combined?
Estimate (about how many...), 30,000 people
400
Solve 607 + 292 using the Make a Ten Strategy
899
400
Use rounding to estimate 608,392 + 210,389
800,000
400
194,920 - 129,999
64,921
400
270,803- 158,359
112,444
400
Caroline has 10 pairs of socks. Martin has 21 pairs of socks. How many more pairs does Martin have than Caroline?
Exact (How many more...), 11
500
Solve 448 + 35 using the Break Apart Strategy
483
500
Use front-end estimation to estimate 670,000 - 31,903.
670,000
500
In January, 9,382 babies were born in the United States. In March, 6,385 babies were born in the United States. How many more babies were born in January?
2,997
500
630,000-125,914
504,086
500
In 2007 it rained 9 inches. In 2008 it rained 15 inches. In 2009 it rained 16 inches. About how much rain did we get in the three years combined?