56+450 50+4292
27+946 32+428
7+4294 6+3844
69=54 76+777-8
405=35 4×730
20+45=
65-8=
20+80=
33+9=
26-8=
34-6=
63-6=
50 56
83+683-6 58-958-6 45+2045+2
74+682-6 78-558+6 35+4055+20