Question

11/3×(5/7-2/5)-11/3×5/7+22/3×1/5

Answer 1

原式

= 11/3×5/7 -11/3×2/5 -11/3×5/7 +2×11/3×1/5

= -11/3×2/5 +11/3×2/5

= 0

~ 满意请采纳,不清楚请追问.

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