题目内容
4000÷(16+832÷13) | (326+95×25)÷37 | (7236÷18-228)×28 |
(4275-24×75)÷25 | 175×56+25×56 | 48×125. |
分析:(1)先算小括号里面的除法,再算小括号里面的加法,最后算括号外的除法;
(2)先算小括号里面的乘法,再算小括号里面的加法,最后算括号外的除法;
(3)先算小括号里面的除法,再算小括号里面的减法,最后算括号外的乘法;
(4)先算小括号里面的乘法,再算小括号里面的减法,最后算括号外的除法;
(5)运用乘法分配律简算;
(6)先把48分解成6×8,再运用乘法结合律简算.
(2)先算小括号里面的乘法,再算小括号里面的加法,最后算括号外的除法;
(3)先算小括号里面的除法,再算小括号里面的减法,最后算括号外的乘法;
(4)先算小括号里面的乘法,再算小括号里面的减法,最后算括号外的除法;
(5)运用乘法分配律简算;
(6)先把48分解成6×8,再运用乘法结合律简算.
解答:解:(1)4000÷(16+832÷13),
=4000÷(16+64),
=4000÷80,
=50;
(2)(326+95×25)÷37,
=(326+2375)÷37,
=2701÷37,
=73;
(3)(7236÷18-228)×28,
=(402-228)×28,
=174×28,
=4872;
(4)(4275-24×75)÷25,
=(4275-1800)÷25,
=2475÷25,
=99;
(5)175×56+25×56,
=(175+25)×56,
=200×56,
=11200;
(6)48×125,
=6×8×125,
=6×(8×125),
=6×1000,
=6000.
=4000÷(16+64),
=4000÷80,
=50;
(2)(326+95×25)÷37,
=(326+2375)÷37,
=2701÷37,
=73;
(3)(7236÷18-228)×28,
=(402-228)×28,
=174×28,
=4872;
(4)(4275-24×75)÷25,
=(4275-1800)÷25,
=2475÷25,
=99;
(5)175×56+25×56,
=(175+25)×56,
=200×56,
=11200;
(6)48×125,
=6×8×125,
=6×(8×125),
=6×1000,
=6000.
点评:本题考查了基本的分数的加减混合运算,要注意分析数据,选择合适的简算方法简算.
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