6×7+2{#blank#}1{#/blank#}6+2×7            40-3×5{#blank#}2{#/blank#}25

(8+16)-4{#blank#}3{#/blank#}8+(16-4)      25-4×3{#blank#}4{#/blank#}(25-4)+3

73+7-60{#blank#}5{#/blank#}30                2×(36-30){#blank#}6{#/blank#} (36-30)×2

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）=

①86-59=

②17+28=

③6+57=

④53+28-35=

⑤76-8+19=

⑥50+27-9=