问题
填空题
计算:[2
|
答案
[2
-(8.5-23 5
)÷3.5]×72 3
=1 2
=[
-(13 5
-17 2
)÷8 3
]×7 2
,15 2
=[
-13 5
×35 6
]×2 7
,15 2
=[
-13 5
]×5 3 15 2
=
×13 5
-15 2
×5 3 15 2
=
-39 2 25 2
=7.
计算:[2
|
[2
-(8.5-23 5
)÷3.5]×72 3
=1 2
=[
-(13 5
-17 2
)÷8 3
]×7 2
,15 2
=[
-13 5
×35 6
]×2 7
,15 2
=[
-13 5
]×5 3 15 2
=
×13 5
-15 2
×5 3 15 2
=
-39 2 25 2
=7.