练习一
15+38+27= 50-3+37= 56+25-25=
45-22-17= 34-2-7= 51-45+29=
22+39+35= 14+7-13= 50-37-12=
26-26+31= 47+46-26= 65-26-27=
练习二
43-2-37= 52+31+5= 20+15+21=
22+10+14= 54-32-10= 52-17+30=
65+26-27= 28-19+7= 26+40+38=
36+11-30= 64-27+3= 24+26-40=
练习三
15+13-12= 62-16+27= 25+37+27=
44-39-1= 51+47+23= 47-33-11=
63-17+14= 40-32-2= 30+47-38=
51-21+22= 8+18+47= 35-9-18=
练习四
57-10+45= 39+60+15= 15+28-29=
41-20-7= 32+4+47= 65-20-40=
28+19+46= 13+15+47= 62+20-5=
16-5-1= 29-13+3= 11+40+50=
练习五
48+34-38= 59-15-9= 41-3-24=
46-32+6= 33-33-0= 6+19-10=
68+20+33= 28+3-2= 46+24+14=
30+65+13= 48+17-44= 44-23-20=
练习六
33+55-49= 54-21+9= 30+23+7=
20-8-2= 41+55+14= 7-7-0=
60+37-22= 16-8-4= 12+59+47=
6+10+18= 35+29-6= 17+60-46=
练习七
55+5+33= 65-25+13= 22+19-25=
39+57-18= 28-12+15= 23+7-27=
19+68+44= 37-25+2= 42+1-26=
41+48-47= 5+20-25= 45-41-4=
练习八
23-7+19= 65+24+43= 39-13+37=
50-29-5= 10-7+14= 12+39-10=
20+23+21= 63-37-15= 33+6+10=
52-16-30= 35-17+43= 30+46+32=
练习九
45+39-28= 46-45+31= 33+19+25=
55+10+43= 54-4+47= 58+27-17=
37-3+21= 21-14-3= 37+24+31=
12+62+27= 37+34+19= 21+45+17=
练习十
63+13+19= 41-36+39= 33+39-21=
34-14+23= 35+17+5= 40-15-18=
55+27-7= 43-32+37= 48-17-14=
20+46-33= 92-60-13= 67-20+23=
参考答案
练习一
15+38+27=80 50-3+37=84 56+25-25=56
45-22-17=6 34-2-7=25 51-45+29=35
22+39+35=96 14+7-13=8 50-37-12=1
26-26+31=31 47+46-26=67 65-26-27=12
练习二
43-2-37=4 52+31+5=88 20+15+21=56
22+10+14=46 54-32-10=12 52-17+30=65
65+26-27=64 28-19+7=16 26+40+38=104
36+11-30=17 64-27+3=40 24+26-40=10
练习三
15+13-12=16 62-16+27=73 25+37+27=89
44-39-1=4 51+47+23=121 47-33-11=3
63-17+14=60 40-32-2=6 30+47-38=39
51-21+22=52 8+18+47=73 35-9-18=8
练习四
57-10+45=92 39+60+15=114 15+28-29=14
41-20-7=14 32+4+47=83 65-20-40=5
28+19+46=93 13+15+47=75 62+20-5=77
16-5-1=10 29-13+3=19 11+40+50=101
练习五
48+34-38=44 59-15-9=35 41-3-24=14
46-32+6=20 33-33-0=0 6+19-10=15
68+20+33=121 28+3-2=29 46+24+14=84
30+65+13=108 48+17-44=21 44-23-20=1
练习六
33+55-49=39 54-21+9=42 30+23+7=60
20-8-2=10 41+55+14=110 7-7-0=0
60+37-22=75 16-8-4=4 12+59+47=118
6+10+18=34 35+29-6=58 17+60-46=31
练习七
55+5+33=93 65-25+13=53 22+19-25=16
39+57-18=78 28-12+15=31 23+7-27=3
19+68+44=131 37-25+2=14 42+1-26=17
41+48-47=42 5+20-25=0 45-41-4=0
练习八
23-7+19=35 65+24+43=132 39-13+37=63
50-29-5=16 10-7+14=17 12+39-10=41
20+23+21=64 63-37-15=11 33+6+10=49
52-16-30=6 35-17+43=61 30+46+32=108
练习九
45+39-28=56 46-45+31=32 33+19+25=77
55+10+43=108 54-4+47=97 58+27-17=68
37-3+21=55 21-14-3=4 37+24+31=92
12+62+27=101 37+34+19=90 21+45+17=83
练习十
63+13+19=95 41-36+39=44 33+39-21=51
34-14+23=43 35+17+5=57 40-15-18=7
55+27-7=75 43-32+37=48 48-17-14=17
20+46-33=33 92-60-13=19 67-20+23=70