(7.2-3.15)÷0.6×1.396.5×43.5+43.5×28.5-25×43.5
1.2×3.8+2.4×1.9+4.8×0.6
3.6×4.7+0.36×51+36×0.02
列竖式。309÷3=
列竖式。365×4=
简算: