(1) 60-7＝ 5+74＝ 45-5＝ 9+45＝ 37-8=
(2) 26+30＝ 52+9＝ 93-60＝ 26-4＝ 68-60=
(3) 74－8= 27＋20= 59-8= 26－20= 31-6=
(4) 54－30= 7+55= 70-5= 35＋5= 82+9=
(5) 40-8= 58＋30= 27＋7= 95－70= 45+3=
(6) 45+7 = 4+25= 8+25= 52-30= 45-7=
(7) 27+6＝ 27+8＝ 20+25＝ 80＋10＝ 50+7=
(8) 45-7＝ 68-4 = 64-8= 8+48 = 87-7=
(9) 30＋30= 77－7= 39-10 = 39+5 = 45+5=
(10) 83－5= 32+50= 26+40= 14+6= 26+9=
(11) 57-30= 93-9= 50-3= 75-7= 72-5=
(12) 67-30= 30+26= 94-30= 35+20= 19+10=
(13) 85-40= 84+5= 34+40= 58+6= 50-4=
(14) 61-4= 69-30= 72-8= 12-3= 50-6=
(15) 58+10= 64+7= 71-9= 70+8= 34-20=
(16) 14-9+6= 15-8-5= 9+8-9= 14-7+4= 16-7+5=
(17) 50－40＋6= 72＋8－30= 45＋9－30= 34－20＋40=
(18) 15–(5+4)= 8+(5+7)= 13–(5+4)= 65-7-40=
(19) 87-9-10= 43-(3+27) = 76-6-8= 39–(9-5)=
(20) 36+40+2= 59-9-20= 63-30+5= 30+(11-7)=
(21) 47+(5+7)= 83-(27-20)= 17+6+8= 43-8-30=
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