1
4
×125×
1
125
×8
1
2
+
1
3
+
1
6
×24
3
7
×(
4
5
-
2
3
)÷
3
15
3
1
8
÷
5
7
+3
1
8
÷
2
7
7
5
6
+8.9+2
1
6
+6.1
0.36×101
20-(5.6+4.8)÷1.3 3.2×(2.15+1.95÷6.5)
4
5
+
1
4
)÷
7
3
+
9
10
36×(
1
4
+
1
6
-
1
3
分析:本題據(jù)四則混合運算法則計算即可:先算乘除,再算加減,有括號的要先算括號里面的.同時要認(rèn)真分析式中數(shù)據(jù),能簡算的要簡算.
解答:
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    <table id="uk0e2"><pre id="uk0e2"></pre></table>
    解:①
    1
    4
    ×125×
    1
    125
    ×8
    =(
    1
    4
    ×8)×(
    1
    125
    ×125),
    =2×1,
    =1;②
    1
    2
    +
    1
    3
    +
    1
    6
    ×24
    =
    1
    2
    +
    1
    3
    +4,
    =4
    5
    6
    ;

    3
    7
    ×(
    4
    5
    -
    2
    3
    )÷
    3
    15

    =
    3
    7
    ×
    2
    15
    ×
    15
    3
    ,
    =
    2
    7
    ;④3
    1
    8
    ÷
    5
    7
    +3
    1
    8
    ÷
    2
    7

    =
    25
    8
    ×
    7
    5
    +
    25
    8
    ×
    7
    2

    =
    35
    8
    +
    175
    16
    ,
    =
    245
    16
    ;

    ⑤7
    5
    6
    +8.9+2
    1
    6
    +6.1
    =(7
    5
    6
    +2
    1
    6
    )+(8.9+6.1),
    =10+15,
    =15;

    ⑥0.36×101
    =0.36×100+0.36,
    =36+0.36,
    =36.36;

    ⑦20-(5.6+4.8)÷1.3
    =20-10.4÷1.3,
    =20-8,
    =12;

    ⑧3.2×(2.15+1.95÷6.5)
    =3.2×(2.15+0.3),
    =3.2×2.45,
    =7.84;

    ⑨(
    4
    5
    +
    1
    4
    )÷
    7
    3
    +
    9
    10

    =
    21
    20
    ×
    3
    7
    +
    9
    10

    =
    9
    20
    +
    9
    10
    ,
    =
    27
    20

    ⑩36×(
    1
    4
    +
    1
    6
    -
    1
    3

    =36×
    1
    4
    +36×
    1
    6
    -36×
    1
    3

    =9+6-12,
    =3.
    點評:完成此類題目要細(xì)心分析數(shù)據(jù),然后據(jù)計算法則和運算定律完成.
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