根据计算结果,在横线上填上运算符号 1.6_1.2_0.9=1.3; 1.6_1.2_0.9=1.728; 1.6_1.2_0.9=1.02; 1.6_1.2_0.9=2.68.

问题描述:

根据计算结果,在横线上填上运算符号
1.6______1.2______0.9=1.3;    
1.6______1.2______0.9=1.728;
1.6______1.2______0.9=1.02;    
1.6______1.2______0.9=2.68.

1.6-1.2+0.9=1.3
1.6×1.2×0.9=1.728
1.6×1.2-0.9=1.02
1.6+1.2×0.9=2.68.
故答案为:-,+,×,×,×,-,+,×.