题目内容

(2013?道里区模拟)计算:
128+35×3 700-125×3 330÷5+46×7 (210+630)÷7
145-150÷2+23 560÷4-630÷7 12×(280-80÷4) 38.7÷9-66.8÷40
(135+55)÷(15-7) 4.5+5.5÷5-3.42 26×4-425÷5 (100-51)÷0.07
(37×15-55)×8 (445÷5+172)×18 300-(76+40×3) 8.9×200-1.2÷0.06
522÷(328-319)+42
8
9
+
1
18
+
1
2
1-
5
6
+
1
7
分析:根据四则混合运算的运算顺序进行计算即可.
解答:解:(1)128+35×3,
=128+105,
=233;

(2)700-125×3,
=700-375,
=325;

(3)330÷5+46×7,
=66+322,
=388;

(4)(210+630)÷7,
=840÷7,
=120;

(5)145-150÷2+23,
=145-75+23,
=70+23,
=93;

(6)560÷4-630÷7,
=140-90,
=50;

(7)12×(280-80÷4),
=12×(280-20),
=12×260,
=3120;

(8)38.7÷9-66.8÷40,
=4.3-1.67,
=2.63;

(9)(135+55)÷(15-7),
=190÷8,
=23.75;

(10)4.5+5.5÷5-3.42,
=4.5+1.1-3.42,
=5.6-3.42,
=2.18;

(11)26×4-425÷5,
=104-85,
=19;

(12)(100-51)÷0.07,
=49÷0.07,
=700;

(13)(37×15-55)×8,
=(555-55)×8,
=500×8,
=4000;

(14)(445÷5+172)×18,
=(89+172)×18,
=261×18,
=4698;

(15)300-(76+40×3),
=300-(76+120),
=300-196,
=104;

(16)8.9×200-1.2÷0.06,
=1780-20,
=1760;

(17)522÷(328-319)+42,
=522÷9+42,
=58+42,
=100;

(18)
8
9
+
1
18
+
1
2

=
17
18
+
1
2

=
13
9


(19)1-
5
6
+
1
7

=
1
6
+
1
7

=
13
42
点评:本题考查了简单的四则混合运算,关键是理清楚运算的顺序,然后根据运算顺序逐步求解即可.
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