<<<
2.34
⑴18.6+20=
7.05+32.5=
⑵24.7-10.7=
50-39.8=
⑶4.5×102=
8.04×0.9=
⑷6÷12=
6.5÷0.5=
32.8×1.6= 12÷2.5= *73.8÷0.6= 验算:
①16.4÷25÷4
②6.9×3.6+3.6×3.1
③14.4+1.25÷0.5
④(16.8+4.9)÷0.7