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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)=
12、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=21.71-30
13、+4= 46.12-(10+1)=71.36-(35+1)=22.2+27-3= 47.2+44-23= 72.20+56-53=23.60+35-14= 48.42-75+49= 73.67-(45+17)=24.67-35+13= 49.35-(21-10)=74.41-(11-1)=25.28-(13+6)=50.51+13-57= 75.45-83+45=练习题五1.14-(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.
14、22+31-40= 29.99-(39+59)=54.19+51-63=5.86-(24+45)=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
15、.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-
16、22=20.93-(83+1)=45.18-(13+4)=70.43+55-27=21.71-30+4= 46.12-(10+1)=71.36-(35+1)=22.2+27-3= 47.2+44-23= 72.20+56-53=23.60+35-14= 48.42-75+49= 73.67-(45+17)=24.67-35+13= 49.35-(21-10)=74.41-(11-1)=25.28-(13+6)=50.51+13-57= 75.45-83+45=练习题六1.10-8+1= 26.60+38-61= 51.92-(28+50)=2.92-(44+26)=27.56-49+35= 5
17、2.75-(65+3)=3.58-(39-14)=28.56-(11-4)= 53.26-(24+1)=4.51-(40+7)=29.74+24-9= 54.87-77+6=5.51-(18+5)=30.83+0-4= 55.21-(12-1)=6.54-18+45= 31.73-(60-51)=56.77+19-8=7.11+51-51= 32.23-(8+7)= 57.82-51+15=8.94-(50-28)=33.16-9+34= 58.12+67-31=9.84-(49-20)=34.14-(2-1)= 59.84+15-9=10.87-8+2= 35.83-(10+11)=60.2
18、3-1+69=11.40-(38+1)=36.58+5-43= 61.34-7+36=12.57+30-35= 37.78-38+17= 62.17+73-50=13.86+11-73= 38.68+21-58= 63.87-(51-34)=14.90-(21+23)=39.0+92-74= 64.58-(15-6)=15.49-(16-13)=40.93-(28+45)=65.73-13+26=16.94-(62-14)=41.21+23-36= 66.15-12+6=17.0-(0+0)= 42.38-(7+9)= 67.64-1+1=18.26+51-73= 43.82+5-77= 68
19、.9+88-85=19.92-(15+26)=44.23+66-60= 69.26-(21+4)=20.62-30+14= 45.47-5+3= 70.56+37-30=21.71-8+3= 46.36-19+9= 71.42+48-39=22.52-(24+16)=47.21+46-17= 72.13-(10+1)=23.15-(4-2)= 48.50-(27+11)=73.1-(1-1)=24.15-9+11= 49.35-(3-1)= 74.32-(12-9)=25.33-(5+4)= 50.9-(2-1)= 75.67-(35+12)=练习题七1.75+14-38= 26.27-11+
20、45= 51.46-35+16=2.12-(1+10)=27.20+9-10= 52.10+46-41=3.21-(12+5)=28.23-(6+7)= 53.38-(4-2)=4.83-58+10= 29.64-(54-10)=54.82-(35-17)=5.89+2-1= 30.44-(19+13)=55.19-(4-2)=6.66-47+13= 31.52-(13-10)=56.46-(15+9)=7.44-56+51= 32.30-(23-12)=57.37+18-7=8.46+41-44= 33.50-37+2= 58.5-(2-1)=9.61-33+33= 34.30+58-53=
21、 59.85-(19-17)=10.2-(1+1)= 35.7+0-5= 60.32+0-8=11.76-26+0= 36.37+39-74= 61.20-18+64=12.47+32-62= 37.10-(7+1)= 62.82+0-35=13.72-(60-18)=38.68-(22-18)=63.44-20+24=14.89-(49+33)=39.15+18-10= 64.82-61+16=15.32-0+26= 40.12-(11+1)=65.7-(2+3)=16.52+20-62= 41.84-76+5= 66.40-(10-8)=17.63+12-8= 42.41-29+27= 6
22、7.68-(25+8)=18.30-(9-5)= 43.73+4-30= 68.26+29-18=19.7-(2-1)= 44.5-0+88= 69.99-(12+1)=20.82+9-1= 45.64+18-63= 70.37+45-8=21.31-(17-14)=46.6-(4+1)= 71.48+13-35=22.58-(16+14)=47.81-(77+3)=72.92-(15-2)=23.62-(53+7)=48.1+0-0= 73.37-(5-3)=24.53+40-42= 49.17-(10+1)=74.95-(75-69)=25.14-30+21= 50.26-6+18= 75
23、.57-(26-25)=练习题八1.59-15+28= 26.46-27+16= 51.53-21+19=2.51+32-22= 27.36-15+14= 52.79-45+2=3.30+67-62= 28.16-(1-1)= 53.76-(35-1)=4.38-(24-7)= 29.80+5-2= 54.45+52-94=5.86-(27-21)=30.35-16+11= 55.15+30-0=6.13-(12+1)=31.82-65+8= 56.60-(28-18)=7.29-87+67= 32.26-(6-5)= 57.97-(25+6)=8.4-(3-1)= 33.63-59+29=
24、58.77-(7-2)=9.41+27-21= 34.63-(2+55)=59.59-21+34=10.9+87-16= 35.22-(7+9)= 60.59-(49+2)=11.75-(8-4)= 36.47-(26+12)=61.22+41-38=12.16-56+50= 37.15+55-16= 62.48-31+41=13.36+50-25= 38.65-56+10= 63.3-(1+1)=14.56-(38-31)=39.79-(63-35)=64.24-(15+2)=15.1+98-39= 40.88-16+5= 65.22-(12+9)=16.29-33+14= 41.39-(1
25、1-4)= 66.71+15-24=17.48-(45-14)=42.47-28+25= 67.58-66+17=18.71-59+5= 43.44-(2+16)=68.49+6-17=19.79-(12+19)=44.56-(20+32)=69.53-(7-4)=20.95-(62-60)=45.81+15-84= 70.54+38-52=21.61+26-76= 46.17-(2-1)= 71.60-(27-17)=22.39-1+4= 47.59-(32+26)=72.59-(14-1)=23.63-21+18= 48.79-(61+7)=73.49-(9-7)=24.73-38+25=
26、 49.35+46-74= 74.68-31+2=25.43-(16-12)=50.77+8-46= 75.60-(13+44)=练习题九1.99-(35+40)=26.26-9+26= 51.68-(26+28)=2.28+59-25= 27.73-(71-41)=52.9+59-7=3.52-(28-24)=28.17-(14+1)=53.90-(1+77)=4.65-(40-26)=29.42-(2+11)=54.19-(18+1)=5.4+5-5= 30.76-(53-10)=55.16-(1-1)=6.97-(26-2)= 31.40-(29-23)=56.81+11-89=7.22
27、-(3+16)=32.59-0+13= 57.40-(28+7)=8.54-24+0= 33.19-(2-1)= 58.66-(33+21)=9.19-(9+9)= 34.60-(53-31)=59.92-(70+4)=10.0-(0-0)= 35.51-(45-33)=60.43-17+15=11.39+13-21= 36.34-29+0= 61.47-(33-24)=12.86-8+5= 37.30-(8+19)=62.70+17-17=13.41-(17-9)= 38.15-(2+12)=63.54+38-14=14.65+6-43= 39.22-20+12= 64.13+40-39=1
28、5.2-(1-1)= 40.52-75+44= 65.63-(10+19)=16.54-(41-16)= 41.43+44-48= 66.38-(22-3)=17.41-(32-26)= 42.97-(55-15)=67.16-40+26=18.35-57+50= 43.51-(28+13)=68.25-18+10=19.17-9+8= 44.57-(27+27)=69.16-(7-6)=20.83-(31-30)= 45.12-(11+1)=70.10+71-29=21.67-(27+5)= 46.80+16-54= 71.35-(17-8)=22.74-(14+20)= 47.59+13-
29、38= 72.60-(53-28)=23.80-54+6= 48.89+8-65= 73.76+2-15=24.18-9+0= 49.0-(0-0)= 74.40-(8-5)=25.31-16+3= 50.48-37+1= 75.71-(29-13)=练习题十1.90-(57+18)= 26.17+44-58= 51.71+4-25=2.41+34-2= 27.5-(2-1)= 52.86-(73-64)=3.26-(4+7)= 28.16-(4+6)= 53.63-(13+31)=4.35-(3+12)= 29.55+21-69= 54.63-(6+2)=5.17-(16+1)= 30.4-
30、(2-1)= 55.46-(16+3)=6.8-65+62= 31.23+11-25= 56.28-7+70=7.56+36-46= 32.38-(12+15)=57.55-(1+11)=8.17-(11+1)= 33.9+5-3= 58.70-41+16=9.11-(6+4)= 34.1-(1-1)= 59.54-(10+5)=10.51-(35+9)= 35.0-(0-0)= 60.88-(22+29)=11.75-(47-35)= 36.38+59-29= 61.30-8+23=12.92-(37+12)= 37.58-66+13= 62.94-(31+50)=13.27-(24+2)=
31、38.3-3+31= 63.32-2+4=14.21-(19+1)=39.37-(10-5)= 64.73-20+17=15.10-(9-4)= 40.4+75-74= 65.30-1+3=16.43-(33+5)=41.28-26+71= 66.82-(71+5)=17.56+33-56= 42.89+1-3= 67.84+14-87=18.88-(79+6)=43.90-(37-16)=68.21-74+62=19.44-73+48= 44.34-14+64= 69.96-(32+27)=20.29+40-40= 45.10-(8-6)= 70.21+57-6=21.36-32+20= 4
32、6.38-(5-2)= 71.23+57-23=22.65+17-78= 47.10-(2-1)= 72.44-(17+25)=23.42-53+31= 48.79+14-55= 73.94-(68+24)=24.55-(20-14)=49.55-(32-11)=74.22+24-14=25.19+43-11= 50.4-(2-1)= 75.61+38-91=练习题一答案2.4427.4352.443.1928.253.04.529.2754.135.4830.2255.46.431.5156.67.1432.3757.188.1733.958.709.1034.2559.7810.2635.
33、3560.011.3636.5561.5612.4337.2362.5113.6238.6063.914.2939.564.6115.740.4265.1216.141.766.1617.4042.1167.2418.443.6168.7619.044.5069.4420.4645.3070.8221.2046.1471.4922.7447.5072.5223.4148.6673.824.2949.3774.225.3650.9475.52练习题二答案1.526.3351.502.5527.1452.563.5428.6653.84.029.7654.85.1730.1955.16.4131.
34、1556.07.732.3257.288.3033.3958.119.1634.1959.510.3135.2860.7411.2236.1461.1712.2537.1062.1513.3238.2663.4314.7039.1664.7315.240.3865.716.1141.4966.1217.742.5667.918.1043.1268.1319.244.2069.7020.4545.7270.6721.946.4171.622.6147.2572.7423.548.2573.124.849.3174.2325.5950.075.4练习题三答案1.1626.3651.332.5527.4652.323.6828.2653.804.6129.1054.765.5230.255.86.1131.3256.167.1632.6857.158.6533.6158.199.6934.9259.3010.5935.2660.5811.2636.7261.7912.4337.5162.1213.5238.663.814.2139.1164.4315.940.2165.316.3041.3766.817.6942.067.5918.1243.4668.019.2844.4769
