练习题一 2 . 53-(47-38)= 27 . 51-(10+2)= 52 . 52-(16-8)= 3 . 30-(22-11)= 28 . 27-(3+22)= 53 . 3-(2+1)= 4 . 13-(2+6)= 29 . 28-24+23= 54 . 32-(7+12)= 5 . 52-(51-47)= 30 . 31-(7+2)= 55 . 18-(2+12)= 6 . 5+1-2= 31 . 19+35-3= 56 . 43-(42-5)= 7 . 44-(16+14)= 32 . 43-18+12= 57 . 23-(4+1)= 8 . 85-72+4= 33 . 83-(23+51)= 58 . 66-29+33= 9 . 11-(4-3)= 34 . 35+33-43= 59 . 79+14-15= 10 . 53-38+11= 35 . 5+68-38= 60 . 3-(2+1)= 11 . 44-(16-8)= 36 . 21+37-3= 61 . 67-43+32= 12 . 4+87-48= 37 . 76-(64-11)= 62 . 77-(63-37)= 13 . 76-(69-55)= 38 . 74+12-26= 63 . 94-(62+23)= 14 . 41-67+55= 39 . 75-(46+24)= 64 . 65-(54-50)= 15 . 27-(18+2)= 40 . 60-(24-6)= 65 . 66-(28+26)= 16 . 4-(1+2)= 41 . 7-(1-1)= 66 . 32+8-24= 17 . 7-2+35= 42 . 45-85+51= 67 . 25-(7-6)= 18 . 6-(3-1)= 43 . 42-26+45= 68 . 91-(86-71)= 19 . 20-(19+1)= 44 . 50+11-11= 69 . 46-(7-5)= 20 . 50-(6-2)= 45 . 42-(26-14)= 70 . 82+17-17= 21 . 29+68-77= 46 . 80-68+2= 71 . 38+59-48= 22 . 76-(25-23)= 47 . 66+2-18= 72 . 59-(51-44)= 练习题二 1 . 33-(27+1)= 26 . 95-(64-2)= 51 . 67+2-19= 2 . 68-30+17= 27 . 26-24+12= 52 . 86-(8+22)= 3 . 32+45-23= 28 . 19-0+47= 53 . 24-(14+2)= 4 . 65-(64+1)= 29 . 83+15-22= 54 . 16-8+0= 5 . 19-(4-2)= 30 . 25-(11-5)= 55 . 71-(49+21)= 6 . 54-(36-23)= 31 . 30-(19-4)= 56 . 0-(0-0)= 7 . 19-(16-4)= 32 . 42-(20-10)= 57 . 40-62+50= 8 . 26+27-23= 33 . 86-(49-2)= 58 . 24-(6+7)= 9 . 10+75-69= 34 . 37-(14+4)= 59 . 37+44-76= 10 . 44+41-54= 35 . 34-(30-24)= 60 . 81-12+5= 11 . 50-37+9= 36 . 28-(25-11)= 61 . 30-(9+4)= 12 . 49+18-42= 37 . 59-(57-8)= 62 . 67+30-82= 13 . 81-(42+7)= 38 . 38+33-45= 63 . 70-(25+2)= 14 . 29-19+60= 39 . 30-(17-3)= 64 . 81-(64-56)= 15 . 7-74+69= 40 . 54+25-41= 65 . 23-(15+1)= 16 . ...
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