"490除以46等于几"...490除以46等于几

　"470除以49等于几"...470除以49等于几

　"490除以4-70等于几"...490除以4-70等于几

　"408除以49等于几"...408除以49等于几

　"409除以54等于几"...409除以54等于几

　"484除以40等于几"...484除以40等于几

　"48560除以490等于几"...48560除以490等于几

　"490除以多少"...490除以多少

　"490除以70+154等于几"...490除以70+154等于几

　"490除以40等于几"...490除以40等于几