计算:(要求写出主要计算过程)(1)[2÷(5.4-314)×143]÷389(2)[(10.75-41112)×27
计算:(要求写出主要计算过程)(1)[2÷(5.4-314)×143]÷389(2)[(10.75-41112)×2711]÷[(1.125+112)÷(2.25÷101...
计算:(要求写出主要计算过程)(1)[2÷(5.4-314)×143]÷389(2)[(10.75-41112)×2711]÷[(1.125+112)÷(2.25÷101011)].
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(1)[2÷(5.4-3
)×1
]÷3
,
=[2÷(
-
)×
]×
,
=[2÷(
?
)×
]×
,
=[2÷
×
]×
,
=2×
×
×
,
=(2×
)×(
×
),
=
×
,
=
;
(2)[(10.75-4
)×2
]÷[(1.125+
)÷(2.25÷10
)],
=[(10
-4
)×
]÷[(
1 |
4 |
4 |
3 |
8 |
9 |
=[2÷(
27 |
5 |
13 |
4 |
7 |
3 |
9 |
35 |
=[2÷(
108 |
20 |
65 |
20 |
7 |
3 |
9 |
35 |
=[2÷
43 |
20 |
7 |
3 |
9 |
35 |
=2×
20 |
43 |
7 |
3 |
9 |
35 |
=(2×
20 |
43 |
7 |
3 |
9 |
35 |
=
40 |
43 |
3 |
5 |
=
24 |
43 |
(2)[(10.75-4
11 |
12 |
7 |
11 |
1 |
12 |
10 |
11 |
=[(10
9 |
12 |
11 |
12 |
29 |
11 |