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1、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+14-1
2、5=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
3、.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)=23.41-37+37= 48.25+61-20= 73.55-(13+34)=24.84+1-56= 49.58-34+13= 74.29-(25+2)=25.58-32+10= 50.97-
4、(4-1)= 75.53-32+31=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= 3
5、3.86-(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)=16.52
6、-83+42= 41.98-(37+12)=66.88-80+4=17.11-72+68= 42.56-19+19= 67.15+1-7=18.12-(10-8)= 43.57-(21+24)=68.23-(16-6)=19.23-21+0= 44.38+5-23= 69.60-22+32=20.46-(4-3)= 45.73-(3-2)= 70.85+8-26=21.59+28-78= 46.62-37+16= 71.72-(17+49)=22.79+15-33= 47.62-48+11= 72.80-(18-12)=23.8-(2+1)= 48.30-(1+4)= 73.20-(3+16)
7、=24.18-12+2= 49.5+77-51= 74.2+35-14=25.4+71-16= 50.1-(1+0)= 75.22-(4+14)=练习题三1.0+23-7= 26.15+78-57= 51.63+30-60=2.83-(39-11)=27.43-21+24= 52.67+21-56=3.74-19+13= 28.28-(24-22)=53.68+30-18=4.64-(57-54)=29.87+9-86= 54.83-(26-19)=5.91-(88-49)=30.32-(23+7)=55.12-(6-2)=6.78-(61+6)=31.18-10+24= 56.33-68+5
8、1=7.22-46+40= 32.64-13+17= 57.16-58+57=8.78-(4+9)= 33.69+10-18= 58.46-(25+2)=9.70-(47-46)=34.61+34-3= 59.36-(16-10)=10.66-(42-35)=35.63-50+13= 60.25+40-7=11.46-(2+18)=36.83-13+2= 61.93-(58-44)=12.37+32-26= 37.70-35+16= 62.56+35-79=13.53-(8-7)= 38.89-(60+23)=63.24+5-21=14.76+18-73= 39.84-(72+1)=64.68
9、-(26-1)=15.15-(5+1)= 40.2+71-52= 65.53+5-55=16.44+36-50= 41.60-(26-3)= 66.43-(17+18)=17.84+2-17= 42.38-(37+1)=67.88-(40-11)=18.78-(33+33)=43.31+56-41= 68.36-(35+1)=19.9+28-9= 44.79+16-48= 69.50-(25+6)=20.30-17+9= 45.53-(24-13)=70.54-75+37=21.38-(36-8)= 46.13-20+15= 71.2+44-25=22.76+6-80= 47.83-(13-1
10、1)=72.96-(64-22)=23.19-(6+5)= 48.73-13+21= 73.49-(19+23)=24.69-(39-25)=49.34-(5-1)= 74.14-(7-1)=25.1-(1+0)= 50.55-(31+10)=75.44+37-79=练习题四1.14-(8-2)= 26.58-(9+14)=51.9-(6-3)=2.77+13-19= 27.64-(22-3)= 52.62+29-66=3.89-(62+21)=28.69-5+27= 53.43-(4+8)=4.22+31-40= 29.99-(39+59)=54.19+51-63=5.86-(24+45)=
11、30.6-(2+3)= 55.7+12-15=6.91-(35-17)=31.0+15-2= 56.31+19-18=7.20-(6+11)=32.43-40+0= 57.10+44-48=8.19-(9-6)= 33.35-(18-17)=58.44-24+23=9.83-(65-37)=34.17+76-21= 59.18-(12+3)=10.9+0-6= 35.81-(23+52)=60.70-(48+1)=11.43-(15-8)= 36.65-(39+25)=61.33-68+55=12.84-48+14= 37.45+25-60= 62.28+20-32=13.56-(5-3)= 38.88-(18-6)= 63.39-(38-9)=14.33+40-0= 39.85+11-2= 64.39-(7-3)=15.86-(65-37)=40.68-(6-1)= 65.62+20-46=16.1-(1-1)= 41.20-1+75= 66.58-(19+5)=17.47-(7+25)=42.49-50+26= 67.49-76+37=18.21-(4-1)= 43.61-2+18= 68.64-(46-11)=19.9-(3-1)= 44.99-(10+31)=69.38+43-22=20.93-(83+1)=45.18-(13+4)=70.43+55-27=
