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6a-5a=1 a2+a2=a4 3a2+2a3=5a5 3a2b-4ba2=-a2b
a2+a3=a5 (ab2)3=a2b5 2a-a=2 2a2×a-1=2a
2x+3y=5xy -2ba2+a2b=-a2b 2a2+2a3=2a5 4a2-3a2=1
3a·2a=5a 3a·2a=5a2 3a·2a=6a 3a·2a=6a2
a5+a5=a10 a3÷a﹣1=a2 a•2a2=2a4 (﹣a2)3=﹣a6
=SUM(A2:A5) =SUMIF(A2:A5,800,B2:B5) =COUNTIF(A2:A5,800) =SUM(B2:B5,800,A2:A5)
2a2+3a2=5a4 5a2-2a2=3 a3×2a2=2a6 3a6÷a2=3a4
Sheet1,Sheet2,Sheet3的A2:D5区域 Sheet1的A2:D5区域 Sheet1和Sheet3的A2:D5区域 Sheet1和Sheet3中不是A2:D5的其他区域
SUM(A2:A6) A2+A3+A4+A5+A6 =SUM(A2:A6) =SUM(A2,A6)
3a2﹣6a2=﹣3 (﹣2a)•(﹣a)=2a2 10a10÷2a2=5a5 ﹣(a3)2=a6
(-5)0=0 x2+x3=x5 (ab2)3=a2b5 2a2·a-1=2a
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
2x+3y=5xy 2a2+2a3=2a5 4a2﹣3a2=1 ﹣2ba2+a2b=﹣a2b