问题 解答题 直接填得数.4÷80=______0.25×8=______30÷30%=______0.3×0.3=______7÷1.4=______38×49=______12÷34=______57×56=______56-13=______45+45=______. 答案 4÷80=0.05,0.25×8=2,30÷30%=100,0.3×0.3=0.09,7÷1.4=5,38×49=16,12÷34=16,57×56=40,56-13=12,45+45=85.故答案为:0.05,2,100,0.09,5,16,16,40,12,85.