Tính a) (−9).(+3).(−2).(−11). b) (−5)^2.(−2)^5 c) (−13).(+7) − 4.(−15)
Giải thích
1. (−9).(+3).(−2).(−11) = −594.
2. (−5)2 . (−2)5 = 25.(−32) = −800.
3. (−13).(+7) − 4.(−15) = −91 + 60 = −31.
1. (−9).(+3).(−2).(−11) = −594.
2. (−5)2 . (−2)5 = 25.(−32) = −800.
3. (−13).(+7) − 4.(−15) = −91 + 60 = −31.