{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} {#blank#}4{#/blank#} 

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

19+61{#blank#}1{#/blank#}80        2×9{#blank#}2{#/blank#}20       46-8{#blank#}3{#/blank#}37

50厘米{#blank#}4{#/blank#}5米     32+16{#blank#}5{#/blank#}40      8×9{#blank#}6{#/blank#}89

43-17{#blank#}7{#/blank#}30        4×6{#blank#}8{#/blank#}3×8      53+6{#blank#}9{#/blank#}60

9×8＝       5×5＝       80－6＝       58＋2＝

8＋47＝      72＋9＝        9×7＝        4×8＝

7×4＝      17－8＝        17＋5＝        6×5＝

43－30＝      82－9＝       12－3＝        5×9＝