51+36= 80-29= 4.3+0.82= 5.1-4.06=
13×4= 720÷9= 0.5×20= 0.56÷0.8=
2- =
①391-98-102
②50× - ×41
③611-124×3
④0.403÷(0.12+0.19)
⑤
⑥
⑦[(6.64-5.14)×0.12]÷6
⑧
>>>