3.4×6.6+3.4×3.4 12.83-(7.9+2.83)
9.4÷[(1.3+1.4)÷0.27] 3.7+6.3÷0.21×1.1
7.5×10.1
(29.4-16.8÷2.1)×0.25
5.6×1.25×0.7
9.2×5.5+0.45×92
①
②36×()
③
④
⑤3.24×0.76+3.24×0.24
⑥