3.6÷1.2 -0.8×2.7用简便方法计算3.6÷1.2 -0.8×2.7=3-2.16=0.84
3.6÷0.6÷2-0.4x2x3x0.9=6÷2-0.36x2x3=3-0.72x3=3-2.16=0.84
