按有效数字运算规则,0.854×2.187+9.6×10-5-0.0326×0.00814 =( )。A.1.9B.1.87C.1.868D.1.8680
按有效数字计算规则,3.40+5.728+1.00421,0.03260×0.00814,0.0326×0.00814计算结果分别应保留()、4和3位有效数字。
按有效数字计算规则,0.03260X0.00814=()。A.0.0002653B.2.65X10-4C.2.65X10-4D.2.65X10-4
按有效数字计算规律,0.0326×0.00814=( )。A.0.0002653B.2.653×10-4C.2.65×10-4D.2.6×10-4
要求将2.500按0.2修约间隔修约,其修约数为( )。 A.2.4 B.2.45 C.2.6 D.2.65
2.187×0.854+9.6×10-5-0.0326×0.00814=1.8677,结果正确。()
按有效数字计算规则,0.03260×0.00814= () 。A.0.0002653B.2.65×10-4C.2.6×10-4D.2.7×10-4
【单选题】按有效数字运算规则,0.854×2.187+9.6×10-5-0.0326×0.00814 =()A.1.9B.1.87C.1.868D.1.868
按有效数字运算规则,计算下式,写出主要步骤: ①2.187×0.854+9.6×10-5-0.0326×0.00814; ②35.6×27.38 -0.00236×32.45+3.825×8.768