1.3×5.85.8 0.8×7.57.5
1×0.971 0.37+3.23.2
5.4×5= 7.6+6.6= 2 3.6+8.24= 6.25×1000=
1.25×0.08= 53.2÷100= 0.2×0.04= 2.8×4=
∠1=
∠2=
∠3=