1.5×0.6= 7.7÷0.1= 450÷25= 0.8-0.08+0.8=
9-0.99= 48÷0.25÷4= 0.6+0.34= 5.46÷3.4≈(得数凑整到0.01)
①(1÷0.5+0.5÷1)×2.4
②12.5×3.2×2.5
③45.19-4.8+54.81+5.2
④14.5×3.6-145+6.5×14.5