a , ( 267 kg+ 158 kg ) x 12 = ............ kg = ............... tấn ................. kg
b , ( 40293 kg - 10203 kg ) : 15 = ............... kg = ................. tấn .......................... kg
c , ( 132 kg x 54 ) : 36 = ...........kg = .......................tạ ................kg
d , ( 3888 kg : 12 )x 25 = ............. kg = .............tấn ......................tạ