Răspuns:
1. 3×8+63:7=24+9=33
2. 64:8+9×8=8+72=80
1. a×9-3×9
a=3,4,5,6,7, 8,9
3×9-3×9=27-27=0
2. 32a+(140+440)=32a+440=472
