38+=239
164+=300
158+=435
164-32=
353-144=
408-279=
148+128=
75+258=
185+327=
8×5=
7×6=
9×2=
35÷7=
32÷8=
56÷=

-173=260-185
76+81+45+232=
358-224=+73
154+56+167-328=
79++85=222
156+66-72-131=
174+-129=234
500-183-205-95=