4÷4＝0.

30÷5={#blank#}2{#/blank#}

{#blank#}3{#/blank#}八四十

40÷8={#blank#}4{#/blank#}

5×5=                             3×2=                                  6×6=

2×2=                             4×5=                                  1×4=

7×3=                            4×7=                                  4×4=

28÷4=                           35÷5=                                42÷7=

56÷8=                           36÷9=                                21÷3=