计算: (1)用计算器求值:(3.173-1.25)÷5.23(结果保留三位小数) (2)-12010+|-30|×(
|
(1)在计算器上依次输入3.17,^,3,-1.25,=1.9355013;再依次输入÷5.23=可得结果为0.387.(结果保留三位小数),
即:(3.173-1.25)÷5.23的值保留三位小数为0.387;
(2)原式=-1+30×(
+2 5
-5 6
)-201116 15
=-1+12+25-32-2011
=-2007.
计算: (1)用计算器求值:(3.173-1.25)÷5.23(结果保留三位小数) (2)-12010+|-30|×(
|
(1)在计算器上依次输入3.17,^,3,-1.25,=1.9355013;再依次输入÷5.23=可得结果为0.387.(结果保留三位小数),
即:(3.173-1.25)÷5.23的值保留三位小数为0.387;
(2)原式=-1+30×(
+2 5
-5 6
)-201116 15
=-1+12+25-32-2011
=-2007.