12.5千克=吨 10元5分= 元
3.8×1.50.85×3.8 9.7×0.69.7-0.6
3.57×4.235.7×0.42 2.5×(4+0.4)2.5×4+0.4
∠A=
∠B=
∠C=
4.23+0.5= 6-0.63= 2.1×0×0.1= 5-5×0.4=
0.8×1.1= 0.72= 1.25×10×8= 4.5+5.5×0.1=