题目内容
脱式计算 (1)(15+40)×2-88 |
(2)(74+26)×(96÷8) | (3)32-15+88÷11 |
(4)160÷40-3 | (5)450×2÷(1×9) | (6)(210×50-500)÷250. |
分析:依据整数四则混合运算的顺序计算:先算第二级运算,再算第一级运算,如果只含有同一级运算,按照从左到右顺序计算,有括号先算括号里面的.
解答:解:(1)(15+40)×2-88,
=55×2-88,
=110-88,
=22;
(2)(74+26)×(96÷8),
=100×12,
=1200;
(3)32-15+88÷11,
=32-15+8,
=17+8,
=25;
(4)160÷40-3,
=4-3,
=1;
(5)450×2÷(1×9),
=450×2÷9,
=900÷9,
=100;
(6)(210×50-500)÷250,
=(10500-500)÷250,
=10000÷250,
=40.
=55×2-88,
=110-88,
=22;
(2)(74+26)×(96÷8),
=100×12,
=1200;
(3)32-15+88÷11,
=32-15+8,
=17+8,
=25;
(4)160÷40-3,
=4-3,
=1;
(5)450×2÷(1×9),
=450×2÷9,
=900÷9,
=100;
(6)(210×50-500)÷250,
=(10500-500)÷250,
=10000÷250,
=40.
点评:本题主要考查学生依据整数四则混合运算的顺序解决问题的能力.
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