Răspuns:
1.(6×6+9×5):9=9
(36+45):9=9
81:9=9
(3×4+5)-(6×5-5×4)=7
(12+5)-(30-20)=7
17-10=7
56:(8×4-2×7-5×2)=7
56:(32-14-10)=7
56:8=7
8×10-(5×5+6×6)=19
8×10-(25+36)=19
8×10-61=19
80-61=19
2. 9×8-(64:8+42:6)<6×7+(10×10-6×3)=
9×8-(8+7)=72-15=57
6×7+(100-18)=42+82=124
57<124 (A)
