(26.45+45.12+12.43):4=21
(12.7+19.99+45.24+38.07):5=23.2
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\(\left(26,45+45,12+12,43\right):4\) \(\left(12,7+19,99+45,24+38,07\right):5\)
\(=\left(26,45+57,55\right):4\) \(=\left(32,69+45,24+38,07\right):5\)
\(=84:4\) \(=\left(77,93+38,07\right):5\)
\(=21\) \(=116:5\)
\(=23,2\)
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