①27.055-1.02-8.99②112÷(12-13)③0.38×8.17+3.8×0.383-0.76④[10-(217×38+217×58)]÷767⑤18+[249÷(3.4-1115)×611].-数学
题文
①27.055-1.02-8.99 ②
③0.38×8.17+3.8×0.383-0.76 ④[10-(2
⑤
|
答案
①27.055-1.02-8.99, =26.035-8.99, =17.045; ②
=
=
=
③0.38×8.17+3.8×0.383-0.76 =0.38×8.17+0.38×0.383×10-0.76 =0.38×(8.17+3.83)-0.76, =0.38×12-0.76, =4.56-0.76, =3.8; ④[10-(2
=[10-2
|