3.2+6.8= ×33= 39×101= 0.36÷0.6= 705﹣398≈
-= 3.6÷= 5.4×10%= 0.12= +×3=
0.5×1.4= 12÷= 0.72÷0.8 = 7.5+9.95 =
50×20%= -25%=