24＋{#blank#}1{#/blank#}＝68

{#blank#}2{#/blank#}＋57＝98

40+30=       78-6=         42+5=                6+53=

53+40=       39-20=        7+42=                69-8=

57-6=        88-40=       31+（46-40）=      57-30-7=

25+20-13=     62-12+21=     35+2+30=          8-（27-20）=

17-8=      11-3=       20 + 5=       6+20-6=

4+20=      7+6=        68-8 =       8+5+3=

90-10=     50+8 =      54-50=       75-5-30=

4+52=        22+67=          54+43=          65+20=