Numbers and Rounding
FRONT-END
ESTIMATION
FREE
VERSION
Grades 3-5
Thousands
Addition with thousands
Subtraction with
thousands
Answer keys
Examples included
1 TRIAL WORKSHEET AND ANSWER KEY
FRONT-END
ESTIMATIONS
Addition with thousands
Step 1: If the number is 5 or 3655+2112=
greater, the number
goes up!
Step 2: 4000+2000=6000
If the number is less
than 4, the number
goes down!
Round off to the nearest tens and add!
1) 2913 +1573 = 3000
____ +2000
____ = 5000
2) 7185 +2814 = ____ + ____ =
3) 9425 +1844 = ____ + ____ =
4) 2222 +2985 = ____ + ____ =
5) 3554 +3485 = ____ + ____ =
6) 8177 +1985 = ____ + ____ =
7) 6501 +2644 = ____ + ____ =
8) 3116 +1485 = ____ + ____ =
9) 7903 +2474 = ____ + ____ =
10) 8692 +1884 = ____ + ____ =
FRONT-END
ESTIMATIONS
KEY
Addition with thousands
Step 1: If the number is 5 or 3655+2112=
greater, the number
goes up!
Step 2: 4000+2000=6000
If the number is less
than 4, the number
goes down!
Round off to the nearest tens and add!
1) 2913 +1573 = 3000
____ +2000
____ = 5000
2) 7185 +2814 = 7000
____ +3000
____ = 10000
3) 9425 +1844 = 9000
____ +2000
____ = 11000
4) 2222 +2985 = 2000
____ +3000
____ = 5000
5) 3554 +3485 = 4000
____ +3000
____ = 7000
6) 8177 +1985 = 8000
____ +2000
____ = 10000
7) 6501 +2644 = 7000
____ +3000
____ = 10000
8) 3116 +1485 = 3000
____ +1000
____ = 4000
9) 7903 +2474 = 8000
____ +2000
____ = 10000
10) 8692 +1884 = 9000
____ +2000
____ = 11000