题目内容
(16+1.63×2.87-125×0.115+O.0163×963)÷0.11=
- A.20
- B.26
- C.200
- D.以上答案都不对
C
分析:首先将 O.0163×963变形为1.63×9.63,再将1.63×2.87与1.63×9.63,提取公因式1.63,再将125×0.115变形为12.5×1.15,进一步提取公因式12.5,然后进行运算比较简单.
解答:解;(16+1.63×2.87-125×0.115+O.0163×963)÷0.11,
=(16+1.63×2.87-125×0.115+1.63×9.63)÷0.11,
=[16-125×0.115+1.63×(2.87+9.63)]÷0.11,
=(16-125×0.115+1.63×12.5)÷0.11,
=(16-12.5×1.15+1.63×12.5)÷0.11,
=[16-12.5×(1.15-1.63)]÷0.11,
=(16+12.5×0.48)÷0.11,
=(16+6)×,
=22×,
=200.
故选C.
点评:此题主要考查了运用提取公因式法进行有理数的运算,这样给计算带来了简便.
分析:首先将 O.0163×963变形为1.63×9.63,再将1.63×2.87与1.63×9.63,提取公因式1.63,再将125×0.115变形为12.5×1.15,进一步提取公因式12.5,然后进行运算比较简单.
解答:解;(16+1.63×2.87-125×0.115+O.0163×963)÷0.11,
=(16+1.63×2.87-125×0.115+1.63×9.63)÷0.11,
=[16-125×0.115+1.63×(2.87+9.63)]÷0.11,
=(16-125×0.115+1.63×12.5)÷0.11,
=(16-12.5×1.15+1.63×12.5)÷0.11,
=[16-12.5×(1.15-1.63)]÷0.11,
=(16+12.5×0.48)÷0.11,
=(16+6)×,
=22×,
=200.
故选C.
点评:此题主要考查了运用提取公因式法进行有理数的运算,这样给计算带来了简便.
练习册系列答案
相关题目