=
15+8= ﹣0.3= 13×0.6= 2.8÷0.7=
×= ÷2= += 52=
10-3.8= 2.8+8.2= 1.2÷0.4= 0.88×10= 1.25×11×8=
+ = × = 53= ÷4= 120×( - )=