÷= ×8= ÷14= ÷=
×= ×= 0×= ÷=
0×= ×7= 10×= 39×=
24×= ×= ×= 1.8×=
0.56×= ÷= 12.5%×= 1.5:0.25=(化简比)
7.2÷= 0.34÷10%= 12×= :0.45=(求比值)
×4 × ×1×0
13.3+6.7= 12= = 49×101≈
21×50= 12.5×8= 0.72÷0.8= =