5.06÷0.85.06 6×0.996÷0.99
4.5÷0.254.5×4 3.4公顷3400平方米
14.8+13.5= 0.91÷0.7= 0.125×8= 700÷1000= 0.2b+1.8b=
3.4×0.03= 30÷0.1= 1.63+3.7= 0.52 = 2.7+2.7×0=