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obj1.show1(); obj2.show1(); obj3.show1(); obj2.show2();
33B和3C 3A和3B 333C和3D 3A1和3A2、3B1和3B2
FeAI Fe 2 A1 5 Fe 2 A1 7 Fe 3 Al
objshow1(); obj2.show1(); obj3.show1(); obj2.show2();
3a2﹣a2=3 (a2)3=a5 a3•a6=a9 (2a2)2=4a2
A1,A2,A3=10 SET 10 TO A1,A2,A3 LOCAL 10 TO A1,3.2,A3 STORE 10 TO A1,A2,A3
100YⅡ—60A 250YSⅢ—150×2 D155--67×3 8BⅠ—29A
=(A1+A2+A3)/3 =SUM(A1:A3)/3 =AVERAGE(A1:A3) =AVERAGE(A1:A2:A3)
A1A3 A1A2A3 A1A3A4 A2和A1A3
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V1=9V2 V2=9V1 V2=3V1 V1=3V2
=A1+A2/2 =A1+A3/2 (A1+A2+A3)/3 A1+A2+A3/A1*A2*A3
=A1+A2+A3/3 =SUM(A1:A3)/3 =AVERAGE(A1:A3) =AVERAGE(A1:A2:A3)
'=(A1+A2+A3)/3 '=SUM(A1:A3)/3 '=AVERAGE(A1:A3) '=AVERAGE(A1:A2:A3)
A1,A2,A3=10 SET 10 TO A1,A2,A3 LOCAL 10 TO A1,A2,A3 STORE 10 TO A1,A2,A3
如果A1=90、A2=人数、A3=…""、A4=54、A5=36,则公式"=Count(A1:A5)"返回5 如果A1=6.28、A2=3.74,其余单元格为空,则公式"=Counta(A1:A7)"的计算结果等于2 如果A1=90、A2=人数、A3=""、A4=54、A5=36,则公式"=Count(A1:A5)"返回3 如果A1=6.28、A2=3.74,其余单元格为空,则公式"=Counta(A1:A7)"的计算结果等于3
=SUM(A1, B2: C3) =SUM(A1: C2) =SUM(A1, B2, C3) =SUM(A1: B2: C3)