calcule:
(2 + 1) : (_ 7)
3 2 6
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1
→ (2/3+1/2):(7/6)=
→ (4+3/6):(7/6)=
→ (7/6):(7/6)=
→ (7/6).(6/7)=
→ 42/42=
→→ 1 ←←
→ (4+3/6):(7/6)=
→ (7/6):(7/6)=
→ (7/6).(6/7)=
→ 42/42=
→→ 1 ←←
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