6.72÷2.5÷0.4 5.4×101
9.8÷(0.23+1.3×0.2) [(6.1-4.6)×0.8]÷0.4
2.12×2.7+7.88×2.7 24×10.2 1.25×0.25×3.2
18.4+1.6×3.04 60.2-8.36-1.64
4.8×7.6-3.8×7.6 2.6×(7.2-0.4)
4.6+5.4×3 29.16-6.48-3.52
2.5×13.7×0.4 9.9×4.63+0.1×4.63