30.8÷[14－(9.85＋1.07)]
[60－(9.5＋28.9)]÷0.18
2.881÷0.43－0.24×3.5
20×[(2.44－1.8)÷0.4＋0.15]
28-(3.4 1.25×2.4)
2.55×7.1 2.45×7.1
777×9 1111×3
0.8×〔15.5-(3.21 5.79)〕
（31.8 3.2×4）÷5
31.5×4÷(6 3)
0.64×25×7.8 2.2
2÷2.5 2.5÷2
194－64.8÷1.8×0.9
36.72÷4.25×9.9
5180－705×6
24÷2.4－2.5×0.8
(4121 2389)÷7
671×15-974
469×12 1492
405×(3213-3189)
3.416÷（0.016×35）
0.8×[(10－6.76)÷1.2]
19.4×6.1×2.3 5.67×0.2-0.62
18.1×0.92 3.93 0.0430.24 0.875
0.4×0.7×0.25 0.75×102 100-56.23