Question

21,92 . 17,5 - 61,92 . 78 - 21,92 +18,5 . 78,08 - 61,92 . 22

Answer 1

\(21,92\cdot17,5-61,92\cdot78-21,92+18,5\cdot78,08-61,92\cdot22\)

\(\text{= 21 , 92 . ( 17 , 5 + 1 ) − 61 , 92 . ( 78 + 22 ) + 18 , 5.78 , 08}\)

\(\text{= 21 , 92.18 , 5 − 61 , 92.100 + 18 , 5.78 , 08}\)

\(\text{= 18 , 5 . ( 21 , 92 + 78 , 08 ) − 61 , 92.100}\)

\(\text{= 18 , 5 .100 − 61 , 92.100}\)

\(=\text{100 . ( 18 , 5 − 61 , 92 )}\)

\(\text{= 100 . ( − 43 , 42 )}\)

\(=-4342\)