10-5×1.6598.4-98.4×0.93.2×1.25×0.257.75×0.4-0.432÷0.4810.1×8.64.35-(2.35-1.7)
答案:2 悬赏:80 手机版
解决时间 2021-12-25 23:49
- 提问者网友:温柔港
- 2021-12-25 06:51
10-5×1.6598.4-98.4×0.93.2×1.25×0.257.75×0.4-0.432÷0.4810.1×8.64.35-(2.35-1.7)
最佳答案
- 五星知识达人网友:纵马山川剑自提
- 2021-12-25 08:16
解:
(1)10-5×1.65,
=10-8.25,
=1.75;
(2)98.4-98.4×0.9,
=98.4×(1-0.9),
=98.4×0.1,
=9.84;
(3)3.2×1.25×0.25,
=(4×0.8)×1.25×0.25,
=(4×0.25)×(0.8×1.25),
=1×1,
=1;
(4)7.75×0.4-0.432÷0.48,
=3.1-0.9,
=2.2;
(5)10.1×8.6,
=(10+0.1)×8.6,
=10×8.6+0.1×8.6,
=86+0.86,
=86.86;
(6)4.35-(2.35-1.7),
=4.35-2.35+1.7,
=2+1.7,
=3.7.解析分析:(1)先算乘法,再算减法;
(2)根据乘法分配律进行简算;
(3)根据乘法交换律和结合律进行简算;
(4)先算乘法和除法,再算减法;
(5)根据乘法分配律进行简算;
(6)根据减法的性质进行简算.
点评:此题主要考查整数、小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
(1)10-5×1.65,
=10-8.25,
=1.75;
(2)98.4-98.4×0.9,
=98.4×(1-0.9),
=98.4×0.1,
=9.84;
(3)3.2×1.25×0.25,
=(4×0.8)×1.25×0.25,
=(4×0.25)×(0.8×1.25),
=1×1,
=1;
(4)7.75×0.4-0.432÷0.48,
=3.1-0.9,
=2.2;
(5)10.1×8.6,
=(10+0.1)×8.6,
=10×8.6+0.1×8.6,
=86+0.86,
=86.86;
(6)4.35-(2.35-1.7),
=4.35-2.35+1.7,
=2+1.7,
=3.7.解析分析:(1)先算乘法,再算减法;
(2)根据乘法分配律进行简算;
(3)根据乘法交换律和结合律进行简算;
(4)先算乘法和除法,再算减法;
(5)根据乘法分配律进行简算;
(6)根据减法的性质进行简算.
点评:此题主要考查整数、小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
全部回答
- 1楼网友:一把行者刀
- 2021-12-25 09:04
对的,就是这个意思
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