(1.25)x5分之2-2³÷﹙-1又3分之1﹚²
2个回答

(1.25)x5分之2-2³÷﹙-1又3分之1﹚²

= 5/4 x 2/5 + 8 ÷ 16/9

= 5/4 x 2/5 + 8 x 9/16

= 1/2 + 9/2

= 5

2分之3×[3÷﹙-3分之2﹚²-1四次方

= 3/2 x [3 x 4/9 - 1 ]

= 3/2 x (4/3 -1 )

= 3/2 x 1/3

= 2分之1

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