计算,能简算的要简算.2.144÷3.2+4.32 9.66÷2.3÷0.3 5.5×0.25×1.41.25×2.47×8 27×10.2 4.8×3.8+6.2×4.8
5:6可以写成5÷6,比值是1.2.所以2:3:4=2÷3÷4. .
3÷8═= ÷24= %= :56.
3:4= :8=9: == %
3÷ == :12=七成五= %
÷10==9: == :40.