-5 √ 8 out of 27 ×√ 4 out of 3 ×√ 54

-5 √ 8 out of 27 ×√ 4 out of 3 ×√ 54

-5 √ 8 out of 27 ×√ 4 out of 3 ×√ 54
=-5×2/9√6×2/3√3×3√6
=-5*4/9×6√3
=-40/3√3

Simple calculation, 2 / 5 divided by (3 / 4 plus 2 / 5)

2 / 5 divided by (3 / 4 plus 2 / 5)
=2/5÷（15/20+8/20）
=2/5÷23/20
=8/23
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Calculate the following questions, can be simple to calculate 12.5 divided by 2.5 divided by 0.4 plus 1.5 times 3

12.5/（2.5*0.4）+1.5*3=12.5+4.5=17

Calculate. 5 / 7 divided by (- 2 and 2 / 5) - 5 / 7 times 5 / 12-5 / 3 divided by 4

(5 / 7) - (- 2 and 2 / 5) - (5 / 7) x (5 / 12) - (5 / 3) - (4)
=(5/7)x(-5/12)-25/84-5/12
=-25/84-25/84-35/84
= -85/84.