题文
2+1.75÷150%- 8÷[7.5+0.625×(-1.15)] (+)×23+25÷71 ×67.8+54.3÷1-221×9% (1-)+(3-×2)+(5-×3)+…+(97-×49)+(99-×50) |
题型:解答题 难度:中档
答案
(1)2+1.75÷150%- =2+-, =2+(-), =2+1, =3;
(2)8÷[7.5+0.625×(-1.15)] =8÷[7.5+0.625×(2.75-1.15)], =8÷[7.5+0.625×1.6], =8÷[7.5+1], =8.8÷8.5, =;
(3)(+)×23+25÷71 =×23+×23+; =++; =+(+), =+1, =1;
(4)×67.8+54.3÷1-221×9% =×67.8+54.3×-22.1×, =(67.8+54.3-22.1)×, =100×, =90;
(5)(1-)+(3-×2)+(5-×3)+…+(97-×49)+(99-×50) =1-+3-×2+(5-×3+…+97-×49+99-×50; =(1+3+5+…+99)-(+×2+×3+…+×50), =(1+99)×[(99-1)÷2+1]÷2-(+×50)×50÷2, =100×50÷2-(50+1)××50÷2, =2500-51××50÷2, =2500-450, =2050. |
据专家权威分析,试题“267+1.75÷150%-16845÷[7.5+0.625×(114-1.15)](169+271)×23+2..”主要考查你对 整数,小数,分数,百分数和比例的混合计算 等考点的理解。关于这些考点的“档案”如下:
整数,小数,分数,百分数和比例的混合计算
考点名称:整数,小数,分数,百分数和比例的混合计算
|