Tính a) (-2 1/5) . (-9/11) . (-1 1/14) . 2/5 b) (-5 1/2) . (-1/2) - 2/3 . (-2/3)
Giải thích
a)
−215.−911.−1114.25=−115.−911.−1514.25=−2735
b)
−512.−12−23.−23=−112.−12+49=114+49=11536
a)
−215.−911.−1114.25=−115.−911.−1514.25=−2735
b)
−512.−12−23.−23=−112.−12+49=114+49=11536