15.小数四则混合运算练习 1. × ÷ ÷ + 2. 7.32 2.68 0.3 0.2 1.75 1 5.8 1 3. 0.8×0.68×125 =0.8×125×0.68 =100x0.68 =68 90-3.54-11.46 =90-(3.54+11.46) =90-15 =75 3.6÷0.4-1.2×5 =9-6 =3 0.73×99+0.73 =0.73×(99+1) =0.73×100 =73 (31.6-11.7)÷2.5÷0.4 =(31.6-11.7)÷(2.5×0.4) =19.9÷1 =19.9 3.75×99 =3.75×100-3.75 =375-3.75 =371.25 |