直接写出计算结果①2-7×27=②17-17×1718=③1-12-13=④20.1+14-0.375=⑤0.1252=⑥252÷153=⑦58×98÷38×100=⑧(

Question

直接写出计算结果 ① 2-7×(2)/(7) =	② 17-17×(17)/(18) =	③ 1-(1)/(2) -(1)/(3) =	④ 20.1+(1)/(4) -0.375 =
⑤0.125 2 =	⑥25 2 ÷15 3 =	⑦ (5)/(8) ×98÷(3)/(8) ×100 =	⑧ ((2)/(71) +(1)/(69) )×23+(25)/(71) =

Answer 1

① 2-7×(2)/(7) ，
=2-2，
=0；

② 17-17×(17)/(18) ，
=17×（1- (17)/(18) ），
=17× (1)/(18) ，
= (17)/(18) ；

③ 1-(1)/(2) -(1)/(3) ，
= (1)/(2) -(1)/(3) ，
= (1)/(6) ；

④ 20.1+(1)/(4) -0.375 ，
=20.35-0.375，
=19.975；

⑤0.125 ² ，
=0.125×0.125，
=0.015625；

⑥25 ² ÷15 ³ ，
= (25×25)/(15×15×15) ，
= (5)/(27) ；

⑦ (5)/(8) ×98÷(3)/(8) ×100 ，
=（ (5)/(8) × (8)/(3) ）×（98×100），
= (5)/(3) ×9800，
= (49000)/(3) ；

⑧ ((2)/(71) +(1)/(69) )×23+(25)/(71) ，
= (2)/(71) ×23+ (1)/(69) ×23+ (25)/(71) ，
= (46)/(71) + (1)/(3) + (25)/(71) ，
= (46)/(71) + (25)/(71) + (1)/(3) ，
=1+ (1)/(3) ，
=1 (1)/(3) ．