如题所述
19x(650/25)+28.3
=19×[﹙650×4﹚/﹙25×4﹚]+28.3
=19×26+28.3
=﹙20-1﹚×26+28.3
=520-26+28.3
=520+2.3
=522.3
=19×[﹙650×4﹚/﹙25×4﹚]+28.3
=19×26+28.3
=﹙20-1﹚×26+28.3
=520-26+28.3
=520+2.3
=522.3
温馨提示:答案为网友推荐,仅供参考
第1个回答 2012-06-27
25*4=100
则25*24=600
25*26=650
原式=19*26+28.3
=19*26+26+2.3
=20*26+2.3
=522.3
则25*24=600
25*26=650
原式=19*26+28.3
=19*26+26+2.3
=20*26+2.3
=522.3