48＋{#blank#}1{#/blank#}＜54

48＋{#blank#}2{#/blank#}＜64

45＋{#blank#}3{#/blank#}＜64

41＋37＝{#blank#}1{#/blank#}

3×5＝{#blank#}2{#/blank#}

32＋58＝{#blank#}3{#/blank#}

91－87＝{#blank#}4{#/blank#}

16+80=    72-9=     41-2=    27+63=    50-30=

3×7=      5×4=      9×9=      8×4=    7×6=

2×6=      8×9=      4×4=     3×6=    9×4=

33+8=     52-7=     71-7=     88+10=    64-6=

5×6+5=       8×4-8=    9×3+9=    4×6-4=

8米+15米=（   ）米          1米-50厘米=（   ）厘米

70厘米+30厘米=（   ）米      20分+40分=（   ）小时

6厘米{#blank#}1{#/blank#} 6米          2米{#blank#}2{#/blank#} 20厘米       46+34{#blank#}3{#/blank#}80   

5×3{#blank#}4{#/blank#}5+3             83-38{#blank#}5{#/blank#}44           30+27{#blank#}6{#/blank#}72-6