5道脱式计算(1)

50道脱式计算

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+1111×30.8×[15.5-(3.21+5.79)] (31.8+3.2×4) ÷ 531.5×4÷(6+3)

0.64×25×7.8+2.22÷2.5+2.5÷2

36.25÷4.25×9.9 5180－705×6

24÷2.4－2.5×0.8 (4121+2389)÷7

671×15-974 469×12+1492

19.4×6.1×2.3 5.67×0.2-0.62

18.1×0.92+3.93 0.4×0.7×0.25

0.78+5.436+1 4. 8× 5÷4÷4

9. 9x5÷6+90÷18 10. 3 x 4x8÷4

14. 31x5÷6 x 5 x 6 16. 5 x 9x18-14x2÷7 20. 3x2 x 9÷3 228÷（64-45）

36. 178-145÷5+42 7.2÷0.8-1.2×5

6.5×（4.8-1.2×4） 28-(3.4+1.25×2.4)

2.55×11+2.45×10 555×9+1111×6

（31.8+3.2×4）÷5 31.5×4÷(6+3)

0.64×25×7.8+2.2 2÷0.8+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) 19.4×6.1×2.3 5.67×0.2-0.62