看图写出两个乘法算式并写出口诀。

 {#blank#}1{#/blank#}  

{#blank#}2{#/blank#}          

口诀 {#blank#}3{#/blank#} 

{#blank#}1{#/blank#}×{#blank#}2{#/blank#}={#blank#}3{#/blank#}   

{#blank#}4{#/blank#}×{#blank#}5{#/blank#}={#blank#}6{#/blank#}

2×{#blank#}1{#/blank#}＝18

4×{#blank#}2{#/blank#}＝12

4×6读作{#blank#}1{#/blank#}乘{#blank#}2{#/blank#}，得{#blank#}3{#/blank#}，口诀是{#blank#}4{#/blank#}．

4 × 1 =        3 × 2 =         6 × 2 =        1 × 8 =

4 + 1 =          3 + 2 =           6 + 2 =          1 + 8 =