精确到千分位的近似值是.
1.3÷0.91.3 3.45×1.21.2×3.45 2.6÷1.22.6
260×0.6260 2.38×1.12.38 0.9×3.73.7
0.5×80= 0÷0.73= 2.5×4= 0.8×125=
5.3×99+5.3= 0.49÷4.9= 3.12÷0.01= 0.56÷0.7=