1
3
÷
1
2
×
3
4
1
5
÷3+
1
3
×
4
5
3
5
÷(
3
10
+
5
8
)     
7
9
-
11
18
)÷
11
18
4
5
÷28×
7
5
22
7
÷16×
14
33
19
13
×
6
7
-
6
7
×
5
13
7
8
-
5
6
)÷
11
24
分析:(1)(5)(6)按照從左到右的順序計算;
(2)(7)利用乘法分配律簡算;
(3)先算小括號里面的加法,再算除法;
(4)(8)先算小括號里面的減法,再算除法.
解答:
解:(1)
1
3
÷
1
2
×
3
4
<progress id="zobbx"></progress>
  • =
    1
    3
    ×2×
    3
    4

    =
    1
    2
    ;(2)
    1
    5
    ÷3+
    1
    3
    ×
    4
    5

    =
    1
    5
    ×
    1
    3
    +
    1
    3
    ×
    4
    5

    =
    1
    3
    ×(
    4
    5
    +
    1
    5

    =
    1
    3
    ×1
    =
    1
    3
    ;

    (3)
    3
    5
    ÷(
    3
    10
    +
    5
    8
    ) 
    =
    3
    5
    ÷
    37
    40

    =
    3
    5
    ×
    40
    37

    =
    24
    37
    ;

    (4)(
    7
    9
    -
    11
    18
    )÷
    11
    18

    =
    1
    6
    ×
    18
    11

    =
    3
    11


    (5)
    4
    5
    ÷28×
    7
    5

    =
    4
    5
    ×
    1
    28
    ×
    7
    5

    =
    1
    25
    ;

    (6)
    22
    7
    ÷16×
    14
    33

    =
    22
    7
    ×
    1
    16
    ×
    14
    33

    =
    1
    12


    (7)
    19
    13
    ×
    6
    7
    -
    6
    7
    ×
    5
    13

    =(
    19
    13
    -
    5
    13
    )×
    6
    7

    =
    14
    13
    ×
    6
    7

    =
    12
    13
    ;

    (8)(
    7
    8
    -
    5
    6
    )÷
    11
    24

    =
    1
    24
    ×
    24
    11

    =
    1
    11
    點評:計算搞清運算順序,抓住數(shù)字特點,利用運算定律合理計算即可.
    練習冊系列答案
    相關習題

    科目:小學數(shù)學 來源: 題型:

    (2011?永新縣模擬)
    直接寫出得數(shù).
    510-240=
    0.34+1.6= 64÷0.4=
    1
    3
    +
    1
    2
    =
    3
    4
    -
    3
    8
    =
    5
    6
    ×
    8
    15
    =
    12÷
    3
    4
    =
    1
    2
    -
    1
    2
    ÷1
    =

    查看答案和解析>>

    科目:小學數(shù)學 來源: 題型:

    2
    7
    ×2=
    3
    5
    ×1=
    3
    4
    ×
    1
    3
    =
    12×
    3
    4
    =
    0.9×
    1
    10
    =
    5
    28
    ×7=
    4
    5
    ×
    4
    7
    =
    5-
    3
    7
    =
    7
    24
    ×
    3
    14
    =
    4
    27
    =

    查看答案和解析>>

    科目:小學數(shù)學 來源: 題型:

    直接寫出得數(shù)
    1
    2
    ÷
    2
    3
    =
    3
    5
    ×
    2
    3
    =
    8
    9
    ×4=
    0.5-
    1
    4
    =
    12÷
    3
    4
    =
    5
    3
    =
    1
    4
    +
    1
    3
    =
    12
    58
    ×
    29
    36
    =
    9÷30%=
    12
    58
    ×
    29
    36
    =
    8
    11
    ÷8=
    12×40%=

    查看答案和解析>>

    科目:小學數(shù)學 來源: 題型:

    計算下面各題,能簡算的就簡算.
    1-
    2
    11
    ÷
    8
    11
    -
    3
    4
    3+
    5
    8
    ×
    3
    5
    ÷
    9
    8
    1
    3
    ÷(
    2
    3
    -
    2
    5
    )×
    3
    5
            
    4
    7
    ×
    8
    9
    +
    3
    7
    ÷
    9
    8
    78×150%-78×
    1
    2
    3
    4
    ×[1÷(
    5
    6
    +
    3
    4
    )].

    查看答案和解析>>

    科目:小學數(shù)學 來源: 題型:

    直接寫出答數(shù):
    2
    7
    ×2=
    3
    7
    =
    3
    4
    ×
    1
    3
    =
    12×
    3
    4
    =
    2
    3
    ÷
    1
    6
    =
    3
    4
    =
    9
    10
    =
    1
    6
    ×
    1
    6
    ÷
    1
    6
    ×
    1
    6
    =

    查看答案和解析>>

    同步練習冊答案
    <mark id="zobbx"></mark>