若3.5×[6.8-(1.6+△÷0.9)]÷8.4=0.5,求△的值.

问题描述:

若3.5×[6.8-(1.6+△÷0.9)]÷8.4=0.5,求△的值.

8.4×0.5=4.2,
4.2÷3.5=1.2,
6.8-1.2=5.6,
5.6-1.6=4,
4×0.9=3.6.
所以△=3.6;
综合算式为:
△=【6.8-(8.4×0.5÷3.5)-1.6】×0.9,
=【6.8-1.2-1.6】×0.9,
=4×0.9,
=3.6.