①27.055-1.02-8.99②112÷（12-13）③0.38×8.17+3.8×0.383-0.76④[10?(217×38+217×58)]÷767⑤18+[2
①27.055-1.02-8.99②112÷（12-13）③0.38×8.17+3.8×0.383-0.76④[10?(217×38+217×58)]÷767⑤18+[2...
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]．
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①27.055-1.02-8.99，
=26.035-8.99，
=17.045；
②
÷（
-
），
=
÷
，
=
×6，
=
；
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
×
+2
×
)]÷7
，
=[10-2
×（
+
）]÷7
，
=[10-2
]×
，
=10×
-
×
，
=
-
，
=1；
⑤
+[2
÷(3.4?
)×
]，
=
+[
÷（
?
）×
]，
=
+[
÷
×
]，
=
+[
×
×
]，
=
+
，
=
．
=26.035-8.99，
=17.045；
②
| 1 |
| 12 |
| 1 |
| 2 |
| 1 |
| 3 |
=
| 1 |
| 12 |
| 1 |
| 6 |
=
| 1 |
| 12 |
=
| 1 |
| 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
| 1 |
| 7 |
| 3 |
| 8 |
| 1 |
| 7 |
| 5 |
| 8 |
| 6 |
| 7 |
=[10-2
| 1 |
| 7 |
| 3 |
| 8 |
| 5 |
| 8 |
| 6 |
| 7 |
=[10-2
| 1 |
| 7 |
| 7 |
| 55 |
=10×
| 7 |
| 55 |
| 15 |
| 7 |
| 7 |
| 55 |
=
| 14 |
| 11 |
| 3 |
| 11 |
=1；
⑤
| 1 |
| 8 |
| 4 |
| 9 |
| 11 |
| 15 |
| 6 |
| 11 |
=
| 1 |
| 8 |
| 22 |
| 9 |
| 17 |
| 5 |
| 11 |
| 15 |
| 6 |
| 11 |
=
| 1 |
| 8 |
| 22 |
| 9 |
| 8 |
| 3 |
| 6 |
| 11 |
=
| 1 |
| 8 |
| 22 |
| 9 |
| 6 |
| 11 |
| 3 |
| 8 |
=
| 1 |
| 8 |
| 1 |
| 2 |
=
| 5 |
| 8 |
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