1. 8 × 1/4 ÷ 2 1/2
= 8/1 × 1/4 × 5/2
= 8/1 × 1/4 × 2/5
= 8 × 1 × 2/1 × 4 × 5
= 8 × 2/4 × 5
= 16/20
= 4/5
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1. 8 × 1/4 ÷ 2 1/2
= 8/1 × 1/4 × 5/2
= 8/1 × 1/4 × 2/5
= 8 × 1 × 2/1 × 4 × 5
= 8 × 2/4 × 5
= 16/20
= 4/5