0.89×12.5-0.9×1.25的简便计算

来源:学生作业帮助网 编辑:六六作业网 时间:2024/05/22 13:19:41
0.89×12.5-0.9×1.25的简便计算0.89×12.5-0.9×1.25的简便计算0.89×12.5-0.9×1.25的简便计算0.89×12.5-0.9×1.25=0.89×12.5-0.

0.89×12.5-0.9×1.25的简便计算
0.89×12.5-0.9×1.25的简便计算

0.89×12.5-0.9×1.25的简便计算
0.89×12.5-0.9×1.25
=0.89×12.5-0.09×12.5
=(0.89-0.09)×12.5
=0.8×12.5
=10

0.89x12.5-0.9x12.5
= (0.89-0.9)x12.5
= -0.01x12.5
= -0.125

原式等价于8.9×1.25-0.9×1.25=(8.9-0.9)×1.25=10