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Fact Families
Double Digit Subtraction
Triple Digit Subtraction
Estimation
More Triple Digit Subtraction
100
Write the fact families for the numbers 3, 6, 9.
3+6=9 6+3=9 9-3=6 9-6=3
100
Find the difference: 20-10
10
100
Find the difference: 300-100
200
100
Use rounding to estimate: 43-17
40-20=20
100
Find the difference: 494-271
223
200
Write the fact families for 12, 13, 25.
12+13=25 13+12=25 25-12=13 25-13=12
200
Find the difference: 45-25
20
200
Find the difference: 525-225
300
200
Use rounding to estimate: 65-32
70-30=40
200
Find the difference: 623-197
426
300
Write the fact families for 22, 22, 44.
22+22=44 22+22=44 44-22=22 44-22=22
300
Find the difference: 67-49
18
300
Find the difference: 762-591
171
300
Use rounding to estimate: 82-47
80-50=30
300
Find the difference: 548-318
230
400
Write the fact families for 595, 364, 231.
231+364=595 364+231=595 595-231=364 595-364=231
400
Find the difference: 78-39
39
400
Find the difference: 403-143
260
400
Use rounding to estimate: 721-358 (estimate to the nearest hundred)
700-400=300
400
Find the difference: 956-127
829
500
Write the fact family for 1,020, 98, 922.
922+98=1,020 98+922=1,020 1,020-98=922 1,020-922=98
500
Find the difference: 80-61
19
500
Find the difference: 700-557
143
500
Use rounding to estimate: 357-197 (round to the nearest hundred)
400-200=200
500
Find the difference: 900-459
441