6×4=24
6.6×3.4=22.44
6.66×33.4=
6.6666×3333.4=
, , , ,
3.3÷[(1.3+1.2)×0.6] 7.3×7.3+2.7×7.3 7.5-1.5÷5×0.4
(6.14-3.75)÷2.5÷4 12.5×3.2×0.25
①1.25×3.2×2.5
②×[0.75﹣()]
③×()
④2022×
⑤55×102+646÷38