题目内容
【题目】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 ++ 1﹣+.
【答案】233;325;388;120;93;50;3120;2.63;23.75;2.18;19;700;4000;4698;104;1760;100;;.
【解析】
试题分析:根据四则混合运算的运算顺序进行计算即可.
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)++,
=+,
=;
(19)1﹣+,
=+,
=.