怎样简便就怎样算. 92.8÷8÷1.2518.9-18.9÷1.4[(8.1-5.6)×0.9-1]×0.48.25×4.08+0.75×4.08+4.08.
问题描述:
怎样简便就怎样算.
92.8÷8÷1.25 | 18.9-18.9÷1.4 |
[(8.1-5.6)×0.9-1]×0.4 | 8.25×4.08+0.75×4.08+4.08. |
答
①92.8÷8÷1.25=92.8÷(8×1.25)=92.8÷10=9.28②18.9-18.9÷1.4=18.9-18.9×57=18.9-13.5=5.4③[(8.1-5.6)×0.9-1]×0.4=[2.5×0.9-1]×0.4=[2.25-1]×0.4=1.25×0.4=0.5④8.25×4.08+0.75×4.08+4.08=(8.25+...