(1)1.8×5.46+1.8×4.54, =(5.46+4.54)×1.8, =10×1.8, =18; (2)16.38÷0.36-4.8, =45.5-4.8, =40.7; (3)0.32×0.25×12.5, =0.4×0.8×0.25×12.5, =(0.4×0.25)×(0.8×12.5), =0.1×10, =1; (4)0.85+0.2×1.35, =0.85+0.27, =1.12; (5)2.8÷3.5×4, =0.8×4, =3.2; (6)2.64+8.67+1.33-1.64, =(2.64-1.64)+(8.67+1.33), =1+10, =11. |