Answer:
1. Mistake: None
2. Mistake: 11
Solve:
4(4+3)
4(7)
28
3. Mistake: 19x2
6x5-11x2
30-11x2
30-22
8
4. Mistake:5-9
50-(6+2)
50-8
42
5. Mistake:8+5
42÷6+5
7+5
12
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Answers & Comments
Answer:
1. Mistake: None
2. Mistake: 11
Solve:
4(4+3)
4(7)
28
3. Mistake: 19x2
Solve:
6x5-11x2
30-11x2
30-22
8
4. Mistake:5-9
Solve:
50-(6+2)
50-8
42
5. Mistake:8+5
Solve:
42÷6+5
7+5
12