Study Guide for Subtraction Test
November 5 , 2015
Students should be able to solve problems involving these skills:
Fact Families:
5+7=12
12-5=7
7+5=12
12-7=5
Find a Rule: Each number in the top row is related to the number in the bottom row by a
rule.
In
7
3
Out
4
0
The rule for this table is subtract 3.
10
7
5
2
14
?
Estimating differences:
Round to the hundreds: Round to the tens:
152
200
98
100
-138
100
-42
40
=
100
60
Subtracting two and three-digit numbers:
28
435
54
352
500
-13
- 257
-38
-194
-234
Word Problems: Ms. Lane had 456 cookies. Mrs. Kantor eats 200 of the cookies! How many
cookies does Ms. Lane have left?