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试题原文 |
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(1)98.9×99, =98.9×(100-1), =9890-98.9, =9791.1; (2)8.53-(2.25+3.53), =8.53-3.53-2.25, =5-2.25, =2.75; (3)0.725÷0.5÷0.2, =0.725÷(0.5×0.2), =0.725÷0.1, =7.25; (4)0.25×7×4×0.6, =(0.25×4)×(0.6×7), =1×4.2, =4.2; (5)2.7×3.6+1.4×2.7, =2.7×(3.6+1.4), =2.7×5, =13.5; (6)80.8×101-80.8, =80.8×(101-1), =80.8×100, =8080; |
经过对同学们试题原文答题和答案批改分析后,可以看出该题目“脱式计算,能简算的要简算.98.9×998.53-(2.25+3.53)0.725÷0..”的主要目的是检查您对于考点“小学运算定律和简便算法”相关知识的理解。有关该知识点的概要说明可查看:“小学运算定律和简便算法”。