加法算式{#blank#}1{#/blank#}，表示{#blank#}2{#/blank#}个{#blank#}3{#/blank#}相加，和是{#blank#}4{#/blank#}；

乘法算式：{#blank#}5{#/blank#} 。

二四{#blank#}1{#/blank#}      三五{#blank#}2{#/blank#}       四六{#blank#}3{#/blank#}

二{#blank#}4{#/blank#}一十    {#blank#}5{#/blank#}三得六      {#blank#}6{#/blank#}十二

计算

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