1. 5/6 + 1/3 ÷ 5/6 - 1/3
= (6 ÷ 6) × 5 + (6 ÷ 3) × 1/6) ÷ (6 ÷ 6) × 5 - (6 ÷ 3) × 1/6)
= (1 × 5) + (2 × 1/6) ÷ (1 × 5) - (2 × 1/6)
= (5 + 2/6) ÷ (5 - 2/6)
= 7/6 ÷ 3/6
= 7/6 × 1/2
= 7/6 × 2/1
= 7 × 2/6 × 1
= 14/6
= 7/3
= 2 1/3 (C.)
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1. 5/6 + 1/3 ÷ 5/6 - 1/3
= (6 ÷ 6) × 5 + (6 ÷ 3) × 1/6) ÷ (6 ÷ 6) × 5 - (6 ÷ 3) × 1/6)
= (1 × 5) + (2 × 1/6) ÷ (1 × 5) - (2 × 1/6)
= (5 + 2/6) ÷ (5 - 2/6)
= 7/6 ÷ 3/6
= 7/6 × 1/2
= 7/6 × 2/1
= 7 × 2/6 × 1
= 14/6
= 7/3
= 2 1/3 (C.)