4/5×2.36+3.3×0.8×4/5=4/5x2.36+2.64x4/5=4/5x（2.36+2.64）=4/5x5=4
用乘法分配律简算原式＝4／5×（2.36+3.3×0.8）＝4／5×5＝4
解:原式=4/5×(2.36+3.3×0.8)=4/5×(2.36+2.64)=4/5×5=4
