题文
能简算的要简算 (1)4.9÷+3.7÷-1.6÷ (2)40-15×(+) (3)98%×99+(1-1%)×2 (4)×[-(-0.25)] (5)[-(0.2+)×4.5]÷0.125. |
题型:解答题 难度:中档
答案
(1)4.9÷+3.7÷-1.6÷, =4.9×+3.7×-1.6×, =(4.9+3.7-1.6)×, =(8.6-1.6)×, =7×, =10;
(2)40-15×(+), =40-15×-15×, =40-10-3, =30-3, =27;
(3)98%×99+(1-1%)×2, =98×99%+99%×2, =(98+2)×99%, =100×99%, =99;
(4)×[-(-0.25)], =×[-+], =×[1-], =×, =;
(5)[-(0.2+)×4.5]÷0.125, =[-0.2×4.5-×4.5]÷0.125, =[-0.9-1.5]÷0.125, =1.35÷0.125, =1.08. |
据专家权威分析,试题“能简算的要简算(1)4.9÷710+3.7÷710-1.6÷710(2)40-15×(23+15)(..”主要考查你对 运算定律和简便算法,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:
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