"490除以754等于几"...490除以754等于几

　"490除以7+263等于几"...490除以7+263等于几

　"490除以7+83等于几"...490除以7+83等于几

　"490除以7+58等于几"...490除以7+58等于几

　"484除以49等于几"...484除以49等于几

　"492除以80等于几"...492除以80等于几

　"490除以7+80等于几"...490除以7+80等于几

　"490除以70+154等于几"...490除以70+154等于几

　"490+352除以8等于几"...490+352除以8等于几

　"490除以83等于几"...490除以83等于几