一五{#blank#}1{#/blank#}

3{#blank#}1{#/blank#}5=7{#blank#}2{#/blank#}8  6{#blank#}3{#/blank#}3=9－0   36厘米{#blank#}4{#/blank#}64厘米=1米

56{#blank#}5{#/blank#}8=48    40－20=5{#blank#}6{#/blank#}4  5{#blank#}7{#/blank#}2＞7

5×5=                             3×2=                                  6×6=

2×2=                             4×5=                                  1×4=

7×3=                            4×7=                                  4×4=

28÷4=                           35÷5=                                42÷7=

56÷8=                           36÷9=                                21÷3=