Elementary Test Prep: Math 4 (Grade 4)Invalid Approaches

Below are 2 attempts at solving a problem. Determine which approach to solving the problem is correct.

Click correct if it is the right way to solve the problem.
Click invalid if there is an error in solving the problem.

7 5 8
- 5 3
7 0 5
correct invalid

7 5 8
- 5 3
2 2 8
correct invalid

8 6 5
- 2 1
6 5 5
correct invalid

8 6 5
- 2 1
8 4 4
correct invalid

9 5 8
-7 2
2 3 8
correct invalid

9 5 8
- 7 2
8 8 6
correct invalid

8 4 7 9
- 2 6 5
8 2 1 4
correct invalid

8 4 7 9
- 2 6 5
8 2 9
correct invalid

7 5 8 0
-5 3
7 0 5 0
correct invalid

7 5 8 0
- 5 3
7 5 2 7
correct invalid

6 5
- 3
6 2
correct invalid

6 5
- 3
6 3
correct invalid

1 1 9
- 3 0
8 9
correct invalid

1 1 9
- 3 0
7 9
correct invalid

7 7 8
- 2 3
7 9 5
correct invalid

7 7 8
- 2 3
7 5 5
correct invalid

9 9
- 3 8
6 2
correct invalid

9 9
- 3 8
6 1
correct invalid

10.

4 0 9
- 6 0
3 4 9
correct invalid

4 0 9
- 6 0
4 4 9
correct invalid

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