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Calculati
1)-6.42(8)+17.19 =
2)-5.009-8,(7)=

Răspuns :

Renatemambouko
1)-6,42(8)+17,19 =-5786/900+1719/100=(-5786+15471)/900=9685/900= =1937/180
6.42(8)=(6428-642)/900=5786/900

 2)-5.009-8,(7)= -5009/1000-79/9= (-45081-79000)/9000=124081/9000
8,(7)=(87-8)/9=79/9



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