2/5+22/9÷[(89/12-23/4)÷45/2+10*2/18]-4/5
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Answer:
8/5
Step-by-step explanation:
=2/5 + 22/9 ÷ [(89/12-23/4)÷45/2 + 10×2/18] - 4/5
= 128/45 ÷[((89-69)/12) ÷ 45/2 + 10/9 ] - 4/5
= 128/45 ÷(5/3 ÷ 45/2 + 10/9) - 4/5
= 128/45 ÷ (2/27 + 10/9 )- 4/5
=128/5 ÷ (2+30)/27- 4/5
= 128/5 ÷ 32/27 - 4/5
= 128/5 × 27/32 -4/5
= 12/5 - 4/5
= 8/5
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