8+（-1/4）-5-（-0.25）= 99*26= （-3.5-7.75-4.25）÷1.1=急

分类: 作业答案 • 2021-12-19 16:58:12

问题描述：

8+（-1/4）-5-（-0.25）= 99*26= （-3.5-7.75-4.25）÷1.1=
急

答

8+（-1/4）-5-（-0.25）=
=8-0.25-5+0.25
=8-5
=3
99*26=
=(100-1)*26
=100*26-1*26
=2600-26
=2574
（-3.5-7.75-4.25）÷1.1=
=(-3.5-12)÷1.1
=-15.5÷1.1
=-155/11