66.8+21.9=
90%-0.8=
30÷80%=
5.5÷0.5=
①1.2÷2.4= ② ③9.34+6.6= ④ 0.24×500=
⑤ ⑥7÷= ⑦×2÷×2= ⑧
526-198=
0.32×2.5=
n×n=
0.32=
24×+=
2.6+1.98=
-=
1.6÷25%=
>>>>>