Five and two -----seven

Five and two -----seven Five and two is/equals seven. 为什么是equals? "Two and five are seven"错在哪里? 完型Last Tuesday I took my two daugters,aged five and seven,to 根据答句写问句 1.Mike is all right.2.five and two is seven. Last Tuesday I took two daughters, aged five and seven, to t two three four five six seven eight two and five 是多少? What's five and seven?It's( ). what is five and two? two hundred and fifty-five seven seven seven two