{#blank#}1{#/blank#} -{#blank#}2{#/blank#} +{#blank#}3{#/blank#} ={#blank#}4{#/blank#}

(答案不唯一)

4＋5－4＝                           16－9＝

7－3＋6＝                           5＋8＝

6＋3－1＝                           12－6＝

6－5＋8＝                           15－8＝

7+5=         8+9=         4+7=         9+9=         4+9=

8+6=         7+7=         4+9=         7+9=         4+8=

5+7=         15+5=         3+8=        6+6=         6+7=

8+7=         5+8=         9+3=         9+5=         8+3=

10-4+8=         10-5+0=         5+5+7=

1+3+10=         19-4-3=         2+6+9=