问题 解答题 口算:2.8÷4×2.51.6+41+0.222-47+3735-3772%÷0.0178-78×1737÷27÷15140.5×12÷12×0.579-79×17-17. 答案 2.8÷4×2.5=1.75,1.6+4=5.6,1+0.22=1.04,2-47+37=167,35-37=635,72%÷0.01=72,78-78×17=34,37÷27÷1514=75,0.5×12÷12×0.5=0.25,79-79×17-17=1121.故答案为:1.75,5.6,1.04,167,635,72,34,75,0.25,1121.