用递等式计算.5.25×3.6+625×514845+5.25+1.2+234225×[3.8÷(3-2.4×1415)]5.13×35-4.63×0.6[1-(14+38)]÷145-78×4049-27.-数学
题文
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答案
(1)5.25×3.6+6
=5.25×3.6+6.4×5.25, =5.25×(3.6+6.4), =5.25×10, =52.5; (2)8
=8.8+5.25+1.2+5.75, =(8.8+1.2)+(5.25+5.75), =10+11, =21; (3)2
=2
=2 |