问题 解答题 8-5.4=0.4×8×25=3.14÷6.28=(12-16)×12= 答案 8-5.4=2.6,0.4×8×25=80,3.14÷6.28=0.5,(12-16)×12=4.故答案为:2.6,80,0.5,4.