24÷3{#blank#}1{#/blank#}2×2       21÷7{#blank#}2{#/blank#}24÷6       45÷9{#blank#}3{#/blank#}35÷5

2×3{#blank#}4{#/blank#}54÷9       81÷9{#blank#}5{#/blank#}18÷9       4×6{#blank#}6{#/blank#}24÷3

4个2相加                                            2×4=8

6+6+6                       4×2                  5乘4

4 + 4+4 +4 +4           6×3                 乘数是6和3

3+3+3+3+3+3           5×4                 2+2+2+2

5 +5 + 5 +5                                        3×6

2乘4                                                    4×5