Question

【统计】求此题的详细解题步骤。

Answer 1

一、简便运算。

①、24×{4分之1+6分之1-3分之1}

=24×1/4+24×1/6-24×1/3

=6+4-8

=2

②、1+0.45÷0.9-8分之7

=1+0.5-7/8

=5/8

③、8分之3×17分之5+17分之5×62.5%

=5/17×(3/8+62.5%)

=5/17×1

=5/17

④、9分之4×【4分之3-｛16分之7-4分之1｝】

=4/9×[3/4-7/16+1/4]

=4/9×[3/4+1/4-7/16]

=4/9×9/16

=1/4

x-25%x=8分之3

(1-25%)x=3/8

3/4x=3/8

x=3/8÷3/4

x=1/2