① {#blank#}1{#/blank#}；

② {#blank#}2{#/blank#}；

③ {#blank#}3{#/blank#}；

④ {#blank#}4{#/blank#}.

4+1=    0+1=    5-2=

3+0=    2+1=    2+2=

0+4=    2+0=    5-3=

1+3=    2+3=    4-4=

3+2=    4-3=    5-4=

□+□=□

9－2＝                      6＋4＝                    9＋1＝                      1＋1＝                      9－9＝

5＋5＝                    10－1＝                    2＋6＝                      9－7＝                      10－3＝

8－4＝                      6－3＝                      8＋1＝                      5－1＝                      8＋2＝

6＋3＝                      7＋3＝                    10－5＝                    0＋0＝                      3－2＝