题目内容
化简.
(1)
(2)2
÷(3
-2
)×2
+18
(3)(1
-1.6)÷[(3.15+1
)×1
]×12.6.
(1)
| 0.2+0.3+0.4+0.5 |
| 0.2×0.3×0.4×0.5 |
(2)2
| 2 |
| 15 |
| 5 |
| 12 |
| 11 |
| 16 |
| 5 |
| 8 |
| 2 |
| 3 |
(3)(1
| 2 |
| 3 |
| 13 |
| 20 |
| 3 |
| 4 |
(1)
,
=
,
=116
;
(2)2
÷(3
-2
)×2
+18
,
=2
÷
×
+18
,
=
×
×
+18
,
=7
+18
,
=26
;
(3)(1
-1.6)÷[(3.15+1
)×1
]×12.6,
=(1
-1
)÷[(3
+1
)×1
]×12.6,
=
÷[
×
]×12.6,
=
÷
×12.6,
=
×
×12.6,
=
.
| 0.2+0.3+0.4+0.5 |
| 0.2×0.3×0.4×0.5 |
=
| 1.4 |
| 0.012 |
=116
| 2 |
| 3 |
(2)2
| 2 |
| 15 |
| 5 |
| 12 |
| 11 |
| 16 |
| 5 |
| 8 |
| 2 |
| 3 |
=2
| 2 |
| 15 |
| 35 |
| 48 |
| 21 |
| 8 |
| 2 |
| 3 |
=
| 32 |
| 15 |
| 48 |
| 35 |
| 21 |
| 8 |
| 2 |
| 3 |
=7
| 17 |
| 25 |
| 2 |
| 3 |
=26
| 26 |
| 75 |
(3)(1
| 2 |
| 3 |
| 13 |
| 20 |
| 3 |
| 4 |
=(1
| 2 |
| 3 |
| 3 |
| 5 |
| 3 |
| 20 |
| 13 |
| 20 |
| 3 |
| 4 |
=
| 1 |
| 15 |
| 24 |
| 5 |
| 7 |
| 4 |
=
| 1 |
| 15 |
| 42 |
| 5 |
=
| 1 |
| 15 |
| 5 |
| 42 |
=
| 1 |
| 10 |
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