90×(7/9+5/6-8/15)÷2又1/33
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![90×(7/9+5/6-8/15)÷2又1/33](/uploads/image/z/349942-22-2.jpg?t=90%C3%97%EF%BC%887%2F9%2B5%2F6-8%2F15%EF%BC%89%C3%B72%E5%8F%881%2F33)
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90×(7/9+5/6-8/15)÷2又1/33
90×(7/9+5/6-8/15)÷2又1/33
90×(7/9+5/6-8/15)÷2又1/33
90×(7/9+5/6-8/15)÷2又1/33
=97÷2又1/33
=97÷67/33
=3201/67
=47又52/67