①1.2÷2.4= ② ③9.34+6.6= ④ 0.24×500=
⑤ ⑥7÷= ⑦×2÷×2= ⑧
547+198=
0.6-0.28=
5.5×=
3.6÷0.36=
7.7÷=
=
×5÷×5=
①210÷35+12×109
②2.5×1.25×16
③()×12
④ [()]