A:plays
B:play
C:playing
5×6÷3=____ 24+25-12=____ 0÷20+5=____
(100-15)÷5=____ (80+40)÷24=____ 350+450=____
56+89=____ 42-42÷6=____ 621×0+17=____
The bottle is empty. Can you help me it some water?
关于x的方程x2x2+1-6xx2+1+2-a=0有实根,则a的取值范围是____.