题文
4×1+45× | 8400-108×42. | 5+3.5÷0.5×5.2 | (1+0.78×)÷(145+) | [2+2.4×(1-1.5)]÷1.1 | (12+999+99)÷[56×(-)]. |
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题型:解答题 难度:中档
答案
(1)×1+45× =×+45×, =+25, =25;
(2)8400-108×42 =8400-(100+8)×42, =8400-[100×42+42×8], =8400-[4200+336], =8400-4200-336, =3864;
(3)5+3.5÷0.5×5.2 =5+7×5.2, =5+36.4, =41.4;
(4)(1+0.78×)÷(145+) =(1+0.65)÷(145+0.75), =1.65÷145.75 =, =, =;
(5)[2+2.4×(1-1.5)]÷1.1 =[2+2.4×-2.4×]÷1.1 =[2.6+4-3.6]÷1.1, =3÷1.1 =;
(6)(12+999+99)÷[56×(-)] =(12-2+1000+100)÷[56×-56×], =1110÷[24-21], =1110÷3, =370. |
据专家权威分析,试题“412×113+45×598400-108×42.5+3.5÷0.5×5.2(1+0.78×56)÷(145+3..”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
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