①12.5×3.2×0.25=(×)×(×)
②6.3×11-6.3=×(-)
③0.75+0.75×16.3+0.75×2.7=×(++)
④6.24-3.34-2.66=-(+)
⑤12.5×(10+0.8)=(×)+(×)
0.4×25= 9.9×10= 0.65×0.2=
50×0.74×0.2= 125×0.08= 80×0.05=
3.2×0.9+3.2= 0.8×1.25×6.2= 10.1×5.6-5.6×0.1=