Explicación paso a paso:
1. 45-80=35
35+45=80
2. 19×2= 38
38-8=30
3. 22×3=66
66+20=86
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Explicación paso a paso:
1. 45-80=35
35+45=80
2. 19×2= 38
38-8=30
3. 22×3=66
66+20=86