3,7/11,1 2 1/2/ 2 1/3 4,8*1,5*0,7/7,8*9,6*1,4 4,2*6,4*0,15/1,6*4,6*0,03

3,7/11,1=3,7/3×3,7=1/3
2 1/2÷2 1/3=5/2÷7/3=5×3/2×7=15/14
4,8×1,5×0,7/7,8×9,6×1,4=4,8×3×0,5×0,7/3×2,6×2×4,8×2×0,7=0.5/2,6×2×2=0,5/10,4=1/2÷52/5=5/104=5/104
4,2×6,4×0,15/1,6×4,6×0,03=4,2×2×2×1,6×5×0,03/1/6×2×2,3×0,03=4,2×2×5/2.3=42/2,3=42÷23/10=10×42/23=420/23