题文
计算下面各题,能简算的要简算. (1)25×1.25×32 (2)7.8×3.4+7+7.8×5 (3)(+)×7×5 (4)(+)÷+ (5)5400-2940÷28×27 (6)÷[(-)÷]. |
题型:解答题 难度:中档
答案
(1)25×1.25×32, =25×1.25×8×4, =(25×4)×(1.25×8), =100×10, =1000;
(2)7.8×3.4+7+7.8×5, =7.8×3.4+7.8×1+7.8×5.6, =7.8×(3.4+1+5.6), =7.8×10, =78;
(3)(+)×7×5, =(+)×(7×5), =×(7×5)+×(7×5), =[(×7)×5]+[(×5)×7], =[2×5]+[1×7], =10+7, =17;
(4)(+)÷+, =÷+, =×+, =+, =;
(5)5400-2940÷28×27, =5400-105×27, =5400-2835, =2565;
(6)÷[(-)÷], =÷[÷], =÷, =. |
据专家权威分析,试题“计算下面各题,能简算的要简算.(1)25×1.25×32(2)7.8×3.4+745+..”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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