题目内容
计算下面各题,能简便的用简便方法计算. 25×36×4 |
135×99 | 203-135÷5 |
97-12×6+43 | 49×99+49 | 5620÷(562×5) |
37+125+63+175 | 175+25÷25+15 | 125×32×25 |
156×l0l-156. |
分析:(1)根据乘法交换律进行简算;
(2)根据乘法分配律进行简算;
(3)先算除法,再算减法;
(4)先算乘法,再算减法,最后算加法;
(5)根据乘法分配律进行简算;
(6)根据除法的性质进行简算;
(7)根据加法交换律和结合律进行简算;
(8)先算除法,再按照从左向右的顺序进行计算;
(9)根据乘法交换律和结合律进行简算;
(10)根据乘法分配律进简算.
(2)根据乘法分配律进行简算;
(3)先算除法,再算减法;
(4)先算乘法,再算减法,最后算加法;
(5)根据乘法分配律进行简算;
(6)根据除法的性质进行简算;
(7)根据加法交换律和结合律进行简算;
(8)先算除法,再按照从左向右的顺序进行计算;
(9)根据乘法交换律和结合律进行简算;
(10)根据乘法分配律进简算.
解答:解:
(1)25×36×4,
=25×4×36,
=100×36,
=3600;
(2)135×99,
=135×(100-1),
=135×100-135×1,
=13500-135,
=13365;
(3)203-135÷5,
=203-27,
=176;
(4)97-12×6+43,
=97-72+43,
=25+43,
=68;
(5)49×99+49,
=49×(99+1),
=49×100,
=4900;
(6)5620÷(562×5),
=5620÷562÷5,
=10÷5,
=2;
(7)37+125+63+175,
=(37+63)+(125+175),
=100+300,
=400;
(8)175+25÷25+15,
=175+1+15,
=176+15,
=191;
(9)125×32×25,
=125×(4×8)×25,
=(125×8)×(4×25),
=1000×100,
=100000;
(10)156×l0l-156,
=156×(l00-1),
=156×100,
=15600.
(1)25×36×4,
=25×4×36,
=100×36,
=3600;
(2)135×99,
=135×(100-1),
=135×100-135×1,
=13500-135,
=13365;
(3)203-135÷5,
=203-27,
=176;
(4)97-12×6+43,
=97-72+43,
=25+43,
=68;
(5)49×99+49,
=49×(99+1),
=49×100,
=4900;
(6)5620÷(562×5),
=5620÷562÷5,
=10÷5,
=2;
(7)37+125+63+175,
=(37+63)+(125+175),
=100+300,
=400;
(8)175+25÷25+15,
=175+1+15,
=176+15,
=191;
(9)125×32×25,
=125×(4×8)×25,
=(125×8)×(4×25),
=1000×100,
=100000;
(10)156×l0l-156,
=156×(l00-1),
=156×100,
=15600.
点评:此题主要考查整数的四则混合运算的运算顺序和应用运算定律进行简便计算.
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