23 +6 ={#blank#}1{#/blank#}    48 – 19 ={#blank#}2{#/blank#}  34 + 56 ={#blank#}3{#/blank#}   38 – 19 ={#blank#}4{#/blank#}

48 – 5 +37={#blank#}5{#/blank#}  56 – 17 + 34 ={#blank#}6{#/blank#} 45 + 9 + 27 ={#blank#}7{#/blank#}  83 – 17 – 35 ={#blank#}8{#/blank#}

5＋27{#blank#}1{#/blank#}50＋27        36＋13{#blank#}2{#/blank#}59－5        58＋7{#blank#}3{#/blank#}57＋8

76－6{#blank#}4{#/blank#}76－9          65－3{#blank#}5{#/blank#}24＋39        25＋25{#blank#}6{#/blank#}17＋33

6028+37             83-6033 9+7685

2290-68 43+3462 66+2686

4550-15 19+3055 34+1751

2米20厘米 4米98厘米 100厘米10米