2×3={#blank#}1{#/blank#}5×5={#blank#}2{#/blank#}38-20={#blank#}3{#/blank#}5×2+5={#blank#}4{#/blank#}

42-7={#blank#}5{#/blank#}6×6={#blank#}6{#/blank#}42+40＝{#blank#}7{#/blank#} 42+5-10＝{#blank#}8{#/blank#}

4×6{#blank#}1{#/blank#}5×5       34－20{#blank#}2{#/blank#}4×4      3×3{#blank#}3{#/blank#}6

5＋16{#blank#}4{#/blank#}5×6      2＋2{#blank#}5{#/blank#}2×2        1米{#blank#}6{#/blank#}50厘米＋60厘米

5×7=      35+12 =      6×5=         6×9=      50－46=

45－3 =    24+25=       4×4=         8×2=      72－22=

90-50+3890-50+38              9角1元                  4×32×6

2×42+2+2+2                        19分2角                  3+23×2