英文；12+15=27,25—7=18,33*3=99,81除9=9,9+6—5=10,4*6+16=40,一个聪明女孩

twelve plus fifteen equals to twenty seven 12+15=27twenty five minus seven equals to eighteen 25—7=18thirty three times three equals to ninety nine 33*3=99eighty one divided nine equals to nine 81除9...