Correct: 7X9=63, 14+18=32, 7X7=49, 25-6=19, 9X9=81, 150-45=105, 9X7=63, 5X5=25, 153+153=306, 9X5=45, 7X6=42, 4X7=28, 6X8=48, 2000-300=1700, 6X6=36, 4X8=32, 30+40=70, 3X8=21, 7X2=14, 78+32=110, Incorrect: 7X9=71, 8X7=98, 14+18=33, 8X8=88, 9X9=78, 150+45=100, 9X7=45, 5X5=55, 153+153=305, 9X5=56, 7X6=89, 4X7=32, 200-300=1700, 6X3=30, 7X3=22, 2X8=17, 8X5=75, 30+40=60, 30+30=70, 78+32=100,

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