1、练习一39-23-13= 45-9-34= 99-85-12= 98-12-84= 59+11+11= 34+18+12= 25+16+13= 14+7+14= 25-8+10= 27-13+20= 44-24+11= 52-28+9= 80-20-60= 84-20-25= 74-50-17= 64-34-17= 40-28+28= 43-29+27=60-30+10= 18+30-11= 30+26+16= 7+18+17= 57+8+18= 62+9+19= 36-23+18= 45+9-34= 99-85+17= 98-84+19= 88-9-72= 82-10-68=练习二88-44
2、-14= 66-33-3= 78-24-14=22+26+18= 36-12+12= 55+25-23=47-25+13= 78-25-15= 33+39-19=58+60-28= 28+31-11= 42+36-22=33+28-18= 36+25-36= 78+13-58=66+50-56= 89-45-44= 93-12-31=87-55-12= 66-33+4= 28+13+22=26-19+24= 33+19-33= 47+14-27=75-25+26= 34-18+36= 19+28-9=33-18+35= 48+16-28= 73-11-22=练习三69-47-11= 58-15
3、-40= 72-35+16= 58-22-27= 5+37+27= 17+33+11= 16+37-22= 7+33+38= 40-16-13= 66-23-18= 32-25+10= 12+35-25= 11+36-39= 40-38+19= 47-19-17= 67+23+3= 16+6+25= 6+18+16=66+14+6= 90-18-10= 88+5-78=78+10-68= 68-59+4= 57-48+29=48-29-9= 55-11+46= 16+55-22= 20-5+45= 50-22+17= 54-25-25= 练习四56-28-8= 68-26-23= 41-19+
4、10=52-14+14= 48+18-37= 17+4+14= 75+16-5= 75+12-5= 18+28+11= 26+25+45= 48-29+10= 16+47-34= 45-36+11= 41-23+10= 55+18+17=68-39-9= 75-37-30= 92-36-30= 65-30-29= 16+55+22= 58+22+13= 17+35-23= 56+14+24= 18+39+16=16+35+25= 76-29-28= 91-22-20= 74-27-29= 93-44-42= 16+37+17= 练习五17-4+17= 75+16-45= 75-26+35=18
5、+28-17= 44-24-18= 67-39-19=98-49+10= 48-8-21= 68-9-57= 69+9-57= 48+23+10= 10+47+33=46+36+19= 45+28+18= 88-44-38= 65-56-5= 35+35+10= 18+35+25= 17+36+33= 40+39+13= 62+28-60= 84-20+27= 74-50+19= 64+37-14= 18+4+14= 8+44+46= 27+44+13= 57+15+11= 38+25+12= 25+8+18=练习六67-18+23= 16-7+25= 26+18-12=66+15-16= 1
6、9+44+11= 66-20-18=79-29-35= 33-4-20= 37-18-4=17+44+22= 8+44-43= 9+44-11= 11+44-22= 21+44-13= 16-7+25= 45-16-14= 77-18-50= 89-10-34= 83-44-23= 45-27+10= 4-65-16= 64-23-19= 66-17-33= 73-34-10= 18+9-19= 64-55+5= 26+15+25= 35+45+10= 27+32+23= 41+19+10=练习七90-47+44= 99-53+35= 72-36+25=50+25-24= 58+22-23=
7、79-38+27=58-47+11= 58+15-40= 58+25-46=88-44+37= 40+16-27= 63+23-18=79-27+9= 38+29-19= 75-37+30=36+28-8= 68+26-28= 55+25-25=91-22+20= 67-39+9= 76-29+28=44-24+18= 93-36+30= 60+30-29=27+11-17= 33+3-20= 50+11-23=34+12-17= 25+13-19= 14-7+14=练习八48+18-21= 45+34-50= 64-56+5=68+19-57= 66+28-16= 69+19-57=88-4
8、4+38= 66+17-33= 63+23-19= 79+9-55= 20+25-17= 60-19+18= 72+18-79= 82-44+23= 49+39-15=48+48-40= 47+19-17= 90-18+10= 25+19-14= 77+14-50= 57-18+11= 38-29+12= 25+33-13= 18-4+17=84-65+28= 30+36-18= 15+16-17= 57-38+18= 30-13+28= 26-15+15=练习九100-89+8= 42-17+28= 56-19+28=61-12-24= 97-69+30= 65+11+19=38+50+5=
9、 27+18+1= 61+10-35=12+54-63= 94-92+30= 69+11+5=4-3+39= 91-7-62= 58+32-35=78+10-86= 27+15-13= 55-47+67=23+37-13= 24+33-33= 23+66-72= 78-59+40= 47+49-86= 47+44+6=70-9+16= 57-12-39= 65+11+19=67+26-36= 13-2+20= 17-3+4=练习十12+54-63= 33+31-13= 74-58+57=23+17+16= 91-7-62= 56+43-87=34+49-22= 87-57-21= 55-47+
10、67=12+82-23= 12+82-23= 15+38+32=78-59+40= 20+73+3= 31+57+6=14+36+37= 57+40+1= 18+45+15=43+35+11= 68+5+2= 19+16+32=19+16+32= 38+50+5= 57-12-39= 42+28+5= 42+28+5= 94-92+30=17-3+4= 97-69+30= 97-69+30= 练习十一58+32-35= 23+17+16= 61+10-35=61+10-35= 23+37-13= 87-57-21=4-3+39= 4-3+39= 47+49-86=15+38+32= 78+7+
11、12= 82+11+6=90+5+4= 12+57+13= 20+53+24=82-28-33= 27+15-13= 27+15-13=65+11+19= 38+50+5= 23+66-72=23+66-72= 12+54-63= 94-92+30=70-9+16= 70-9+16= 91-7-62=58+32-35= 13-2+20= 13-2+20=练习十二55-47+67= 23+37-13= 74-58+57=15+38+32= 78-59+40= 47+49-86=34+49-22= 38+50+5= 57-12-39=65+11+19= 12+82-23= 94-92+30=17-
12、3+4= 12+54-63= 19+16+32=58+32-35= 36+4-24= 57-39-4=55+15-54= 40+27-37= 54-34+3=95-60+60= 45+30-21= 22+62-49=64+19-60= 99-39+3= 69+2-4=93-26-33= 43-20-13= 71-42+41=练习十三19-4+50= 18+46-26= 49-6+12=31+43-3= 56-28+35= 78-39-24=82-61-20= 90-15-29= 11+14-11=93+4+2= 87+10+7= 72+22+2=69+16+6= 84+14+2= 14+16+
13、30=68-61-5= 65+25+7= 6+21+51=28+56+1= 80+16+3= 70+4+17= 95+1+3= 34+11+52= 65+26+3= 1+86+4= 78+19+2= 87+7+1= 47+28+18= 68+23+8= 64+21+5= 练习十四47-25-3= 63-44-6= 44-19-18=89-51-24= 32-24-3= 31-25-3=82-53-10= 85-44-8= 98-23-17=54-37-16= 82-9-3= 98-97-1=96-84-2= 74-40-24= 47-18-11=86-42-23= 63-55-5= 83-44
14、-18=91-28-24= 30-26-3= 64+20+13=35-25-1= 32+12-5= 74+21+5=21+77+3= 27+37-22= 72+17+8= 6-19-41= 83+16+1= 22-20+63=练习十五78+9+2= 23+12+48= 97+35-54=75+22+2= 34-7+28= 30-28+50=85-49-14= 43+10+32= 45+63-62=76-48-19= 53+23-43= 24-2+7=57+31-38= 80-66+58= 22+11-5=46-43+76= 69-54+49= 27-9-2=46-43+76= 69-49+49
15、= 66-25-6=59+39-53= 69-54-15= 66-25-15=14+12+25= 69-3-66= 66-25-6=14+12+25= 53+28-28= 25+44-30=练习十六61-27+9= 52+5-44= 22+11-5=46-43+76= 25+67-14= 75+17-18=46+43-46= 69-54+49= 7+50-56=68-38+34= 69-54+49= 66-25-6=14+84-65= 18-10+21= 66-25-6=14+15+25= 47-14-16= 14+15+21=38+12+45= 65-5+9= 53+28-28=65-5+2
16、8= 65-38+5= 29+45-14=19+33-5= 59-35-14= 29+45-14=49+27-44= 38-15+35= 49+27-44=练习十七49+27-44= 18+62-65= 89-88+23=68-62+65= 18+62-32= 10+83-81=50-43+60= 10+34+25= 56+6-28=57-26+25= 97-86-4= 22+11-5=42+45-79= 80-66+58= 46-43+76=61-27+9= 98-18+8= 73+6-50=41+21-22= 65-55+19= 78-5-13=89-61+62= 98-57+51= 29
17、+1-13=87-70+80= 72-12+15= 47+34-73=28+31-23= 83-50+2= 80-59+71=练习十八14+85-92= 23+17+16= 91-7-62=42+28+5= 23+37-13= 87-57-21=55-47+67= 61-12-24= 47+49-86=15+38+32= 97-46-46= 93-75+57=51+5+37= 81-73-3= 2+20-5=77+21-76= 77+21-76= 5+5+74=22-2+35= 23+44+23= 24+67+7=1+55+33= 45-14+9= 43+26-53=88-7-12= 28+1
18、6+47= 24+67+7=9+31-30= 83-58+72= 71+10-51=练习十九68-58-4= 58-49-2= 25+8+17= 27+13+20= 44+24+11= 52+28+9= 90-47-42= 99-53-35= 72-36-25= 50-25-18= 17+33-11= 16+33-22= 17+33-33= 5+37-27= 43+28+28= 43+29-27= 57+17+18= 18+32+11= 85-25-25= 79-38-27= 64-55-5= 47-38-7= 14+24+24= 47+23+11= 34+17+26= 15+37-17= 8
19、5-26+25=14+26-24= 60-22+11= 26+15+15= 练习二十78-32-16= 55-28-12= 47-19-14=18+33+12= 54+28+2= 32+19+8=48-29-11= 98-33-22= 63-21-32=69+22-22= 29+34-19= 51-38+19=35+19+15= 73-29-13= 67-29+23=53+9+17= 18+53-18= 47+26-27=93-27+27= 81-19+15= 33+19+17=65-19+15= 43-23-17= 69-21-1958+19+12= 34+17+36= 57-19-11=8
20、7-19-27= 53+19+7= 38+15+32=练习二十一88-7-12= 32+43-4= 34-30+59=36+15-28= 83-58+72= 51-25+34=30-1-16= 32+66-88= 34-30+59=75-36+7= 9+54-14= 60+26-2=30-1-16= 21+59-55= 81-73-3=2+20-5= 9+54-14= 63-53+58=5+5+74= 22-2+35= 81-73-3=59+3-18= 1+55+33= 45-14+9=5+5+74= 60-24-15= 28+16+47=24+67+7= 1+55+33= 51+5+37=练
21、习二十二71+10-51= 88-7-12= 28+16+47=77+21-76= 36+15-28= 83-58+72=71+10-51= 23+44+23= 32+66-88=34-30+59= 36+15-28= 43+26-53=60+26-2= 30-1-16= 32+66-88=9+31-30= 2+20-5= 9+54-14=60+26-2= 32+43-4= 22-2+35=81-73-3= 2+20-5= 51-25+34=45-14+9= 5+5+74= 22-2+35=75-36+7= 24+67+7= 50-47+63=练习二十三62-18+15= 24+75-83=
22、11+70+7=72+10+15= 1+55+33= 45-14+9=21+59-55= 88-7-12= 28+16+47=24+67+7= 63-53+58= 83-58+72=71+10-51= 21+5+22= 59+3-18=34-30+59= 36+15-28= 18+76-79=60-24-15= 30-1-16= 32+66-88=77-47+47= 93-75+57= 9+54-14=60+26-2= 37+38+12= 15+5+17=69+29+1= 32+10+2= 11+72+9=练习二十四27+14+10= 39+44+6= 12+10+21=88+7+5= 62+
23、22+6= 37+40+17=81+11+2= 47+5+41= 11+2+34=82+15+2= 55+21+8= 62+17+13=33+24+2= 66+11+14= 84-23-4=71-35-32= 97-46-20= 93-51-37=78-31-23= 72+19-88= 36-33+21=63-50+60= 17+20+44= 13+48+20=79-27-24= 50+2-39= 4+52-26=23-11+72= 98-89+57= 73+13-12=练习二十五94-88+74= 46-22+46= 98-9-54=16+7-16= 89-39+33= 89-16-49=4
24、5-32-1= 62+30-63= 69+12-28=85-67+9= 87-26-5= 94-60-14=55-44+10= 55-21-26= 7+8+35=28+35-40= 75-26-40= 10+63-51=30+19+9= 70-28+44= 35+17-5=97-15-30= 63-50+60= 86-61+33=47+45-30= 40+8+34= 50+2-39=98-38-14= 66-28+60= 63+20+7=练习二十六73+13-12= 58+29-79= 30+68-65=83+2-37= 16+7-16= 17+20+44=26+19-25= 87-26-5=
25、 62+30-63=4+52-26= 98-38-14= 7+8+35=94-60-14= 94-88+74= 58+29-79=30+19+9= 28+35-40= 89-39+33=17+20+44= 63-50+60= 70-28+44=69+12-28= 4+52-26= 50+2-39=86-61+33= 55-44+10= 94-88+74=73+13-12= 36-33+21= 75-26-40=练习二十七89-39+33= 16+7-16= 79-27-24=35+17-5= 69+12-28= 62+30-63=98-89+57= 47+45-30= 55-44+10=94-
26、60-14= 98-9-54= 66-28+60=75-26-40= 28+35-40= 45-32-1=30+68-65= 35+17-5= 70-28+44=87-26-5= 26+19-25= 47+45-30=86-61+33= 7+8+35= 98-38-14=66-28+60= 72+19-88= 30+19+9=58+29-79= 30+68-65= 14+48+2=练习二十八35-23+63= 52-21-25= 29+10+51=34+30-32= 61+20+5= 18+26+2=35-23+63= 25-12+54= 80+2-35=82-67-7= 61+20+5= 6
27、7-5-58=8+63-49= 38+8-32= 80+2-35=12+63-33= 86-16-47= 44-22+44=8+63-49= 99-15-12= 46+7-12=4+13-9= 86-16-47= 42+9+16=74-68+26= 10+47+18= 46+7-12=97-51+40= 93-50+56= 69+18-86=练习二十九74-68+26= 85+3-19= 52-21-25=29+10+51= 93-50+56= 4+85-49=18+26+2= 35-23+63= 52-21-25=63-56+17= 82-67-7= 61+20+5=18+26+2= 73+19-70= 38+8-32=80+2-35= 82-67-7= 14+48+2=44-22+44= 8+63-49= 38+8-32=34+30-32= 4+13-9= 86-16-47=44-22+44= 25-12+54= 10+47+18=46+7-12= 4+13-9= 67-5-58=练习三十69+18-86= 74-68+26= 10+47+18=12+63-33= 29+10+51= 93-50+56
