直接写得数.
3.86+2.4= 7.6﹣0.56= 4.5×102= 3.25+2.3+1.75=
361+199= 7÷0.4= 4=
=
2.5×32= = 0.1÷0.01= 3.47﹣(2.5+0.47)=
4768÷791≈ 12÷= 1÷
=
= 5.58÷0.78≈
4.98×7.11≈ =
=