一年级数学下册口算宝典87.docx
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一年级数学下册口算宝典87.docx
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一年级数学下册口算宝典87
70-40=11-1=88+5-4=63-20+8=
10+10=83-8=48-8-2=60-20-19=
69-50=69+2=71+8-4=40-30+6=
66-40=49+9=86+1-5=77-50+16=
80-20=60+2=52+1-3=75-60+7=
10+20=61+5=55+3-9=87-40+16=
74-30=63+4=21-5-4=73-40+11=
40+30=16+1=47+7-3=70-40+10=
30+10=87-5=44+9-9=64-30+7=
82-20=31-3=25-5-2=84-50+5=
60-30=71+2=30+2-1=90-80-19=
80-70=63+4=50+1-3=70-40+5=
90-40=86+7=74+4-2=87-20+14=
63-10=32+7=73-1-3=73-20+1=
80-60=23+8=68-9-6=72-60+18=
20+30=55+2=18+5-1=76-20+14=
78-30=27+2=39-2-2=84-40+12=
60-30=55-2=61-8-5=82-40+9=
72-30=25+7=34-1-6=81-40+20=
80-60=33+3=57+6-5=75-30+20=
40+40=28+4=39+8-7=72-40+19=
40+10=15+6=77-1-1=40-30-18=
30-20=76+5=20+3-6=64-60+1=
67-40=80-2=82-5-8=66-50+16=
70-50=47-6=45-5-1=60-40+5=
40+20=40+5=17-1-1=83-20+3=
89-10=70-8=86+5-3=90-70+12=
30+30=57+3=50-8-4=40-30-11=
10+20=50-2=27-5-2=85-10+5=
90-60=69-7=84+7-5=90-80-4=
50+30=19+2=29+5-3=80-50+12=
84-60=52+1=69+7-1=81-20+12=
10+20=62+7=46-9-1=83-10+10=
20-10=50+6=81+5-5=82-50+3=
50+20=39-8=34-5-2=72-30+10=
81-20=10+9=67-1-7=89-50+9=
40+20=53+8=25+1-7=90-80+10=
70-30=40-7=75+1-5=64-10+17=
70-60=60-8=28-1-9=64-60+18=
76-40=65-9=63-2-4=69-40+12=
60-20=11+9=37+9-9=70-20+17=
40+10=23-4=16-9-9=84-40+8=
60-20=78+6=51-5-3=62-10+6=
78-50=72+8=24-5-5=82-60+19=
97-40=79-9=87+1-7=70-40-4=
90-70=17-8=54-9-5=83-20+10=
40+20=99-3=50-9-9=76-20+20=
30+10=17-7=79+9-9=90-80+4=
90-40=49-4=43+9-6=63-40+10=
88-20=73-1=86-8-5=70-50+14=
78-10=72+8=57+6-2=66-60+4=
20+20=14+4=81-9-5=83-40+2=
99-10=44-8=69+2-7=60-40-3=
78-30=75+5=38-5-5=87-60+18=
91-30=45-9=13+2-9=60-50+8=
60-50=47-7=44-8-7=65-40+18=
90-20=41+6=80-4-6=65-50+3=
90-80=18+3=53-7-1=80-40-3=
89-40=55+2=69+6-2=88-30+13=
90-70=77-6=71-4-4=90-80-1=
20+20=13-1=38+5-1=84-40+12=
89-60=12-2=80-1-5=79-30+20=
90-70=97-8=76+4-9=64-40+20=
90-60=17+8=86+5-3=80-30-13=
82-10=18-5=27-3-6=80-40+5=
93-50=57+4=32+7-6=67-30+20=
98-30=53-6=64+8-3=65-20+19=
90-70=13+7=71+9-2=70-40-5=
90-20=52-6=17-5-5=61-40+11=
98-50=64-3=30+1-4=80-30+17=
50+20=46+6=86+5-7=85-60+17=
50+30=37+3=64-9-2=60-50+1=
60-20=69-2=35+3-3=80-60+19=
80-70=22+3=29-8-1=90-70-11=
20+10=77+4=20-8-9=80-70-9=
90-70=14-9=57-9-5=80-40+16=
20+10=60-7=47-5-5=90-30-9=
40-30=28+7=86-6-1=80-50-11=
91-60=58+6=22+3-2=85-50+14=
40-30=11+7=67+2-1=70-60+11=
50-30=74+4=81+6-5=30-20+5=
40+20=54-0=38-7-5=86-10+10=
90-60=73+5=36-9-7=65-40+5=
60-40=74-8=64-9-3=71-60+12=
90-80=19-0=50-5-4=90-70+1=
40-20=67+9=22+8-9=79-20+1=
80-40=11+2=88+4-9=70-60-8=
99-10=79-5=43+9-7=66-60+5=
30+10=39+1=11+9-4=80-30+2=
98-60=35+9=90+9-3=80-10-6=
10+10=23+8=45+7-4=73-20+14=
50+30=72-1=10+4-3=82-40+3=
20+30=46+7=51-3-3=80-70-4=
72-50=52-5=70-5-6=70-40+4=
61-30=90-0=64-9-5=90-80-14=
83-50=25+1=66-2-9=83-60+12=
87-40=61+6=47-3-4=61-10+6=
90-80=97-1=38-5-2=80-60+19=
67-20=19+8=85+1-7=74-10+15=
88-30=97-3=74+4-1=80-60+6=
30+20=79+7=27-1-2=86-50+14=
83-10=74-4=54+7-1=77-50+8=
70-40=80+1=78-4-2=88-30+19=
30+40=57-8=63-2-8=90-70-13=
72-60=42+3=82-6-8=89-10+20=
62-60=46-5=16-3-4=63-40+8=
82-50=52+9=61+6-3=88-40+16=
30+20=91-7=61+6-2=63-20+3=
20+20=70-1=65-6-6=72-10+13=
30+20=10+7=59+1-5=90-50+11=
60-20=67-2=22+7-9=63-30+3=
10+20=79-9=25-6-9=40-10-7=
10+30=25+3=89+2-4=90-30-13=
20+20=62+5=69+2-9=69-50+17=
40+10=63-8=77-8-3=61-40+2=
78-20=89+4=77+1-1=90-80-18=
10+20=98-0=84+2-2=90-30+11=
75-40=27-3=79+2-4=80-50-11=
90-40=60+6=32-4-8=90-40+9=
40+20=50+7=56-3-9=89-40+19=
80-30=62-1=80-7-1=78-20+1=
50+20=61-2=14+2-5=90-30+1=
61-40=18-1=88+9-3=82-30+16=
50+10=80+8=54+2-7=60-30-10=
20+20=80+7=23-1-2=78-10+11=
88-30=37+3=77-8-2=50-10-18=
76-20=18+3=87-6-7=90-80+10=
40+10=85-0=25+1-1=81-60+8=
90-40=75-7=38-3-8=62-20+4=
91-10=65+2=21+9-6=90-80+6=
70-40=48-8=87-4-6=50-20+7=
89-10=54+6=39-7-7=80-70+15=
90-20=79+9=66+2-6=77-10+15=
90-50=20+1=45+6-2=70-60+13=
10+30=64-2=75+9-8=64-50+10=
93-40=25+9=63+8-9=90-60-12=
30+40=48+6=33+2-9=78-20+10=
84-40=48+5=86-9-7=90-50+1=
30+30=73+2=46-8-7=20-10-14=
50+10=47+7=13+9-2=66-20+18=
90-80=35+8=46-1-7=50-30-6=
10+10=32+2=43+3-7=61-30+12=
80-70=96-6=43+5-1=40-10+8=
20+40=14-9=40+1-3=70-60+7=
90-70=50+2=29-5-2=71-60+8=
72-30=87+1=24-8-8=81-30+2=
97-30=88+4=35+1-7=90-80-18=
63-20=21-7=53+8-3=65-10+3=
81-40=95-9=86-5-8=40-10+9=
30+30=17+9=24+5-7=61-10+5=
40+10=26+3=51-3-6=71-10+6=
88-50=35+2=45-7-2=69-30+13=
73-20=45+8=72+6-4=60-40+17=
50+30=51-8=85-5-2=89-20+7=
30-10=61-4=40-5-5=90-80+10=
90-80=17+9=27+1-3=63-10+17=
30+10=60+7=17-5-4=90-70-15=
90-50=20-1=82+7-3=90-70-1=
63-30=81+7=27+4-7=90-20+8=
90-60=75-2=55-9-5=20-10+18=
80-40=59-3=34-3-9=75-10+2=
50-30=61-9=45-1-8=85-30+18=
90-20=24+5=77+8-2=90-80-13=
50+10=69-4=44-8-5=80-70-12=
40+20=20+9=79-5-3=80-60-7=
64-40=61+1=80+8-2=72-40+14=
87-30=41+1=26-9-2=90-30+2=
30+40=65-4=33-4-2=77-60+7=
20+20=41+6=58-9-8=90-50-6=
40-10=37-4=20-7-3=70-50+6=
73-40=79+5=76-2-2=62-50+5=
83-60=39+6=81+5-5=90-60+9=
40+10=91-8=84-1-2=90-60+9=
72-20=83+7=59+5-4=80-20+7=
60-40=60+9=50+6-7=84-50+3=
94-60=36-8=35+2-1=80-20+3=
30-20=34+3=66-3-6=50-10-8=
10+40=88+9=85+4-7=80-50-14=
40+30=66-3=40+5-7=80-50-5=
40+30=50-6=58-3-7=70-60+8=
90-80=39+6=32-3-5=81-10+6=
86-40=63+4=80-3-6=90-70-9=
90-80=57+1=33+3-4=70-50+13=
64-10=95-3=35-5-8=66-40+14=
30+30=10+9=68+2-1=80-30-10=
86-10=84-1=82+8-6=79-40+4=
80-50=28+1=32+4-5=30-20+5=
40+10=12+3=37-9-3=80-70-1=
90-70=53-7=14-7-4=90-80+15=
40+20=17-1=15-6-9=84-50+14=
79-40=29+7=52-8-1=84-20+1=
30-20=54-8=70-2-8=61-40+5=
82-20=13-2=41-1-4=77-10+15=
81-20=89+6=40-4-4=90-80-2=
73-50=13+7=58+9-6=70-40-16=
40+20=71+1=82-7-4=50-40+16=
61-60=63+8=86-9-4=90-80+13=
60-30=19+2=34-1-6=90-80-2=
50+40=11-7=52-7-8=73-20+1=
20+40=56+3=48-2-7=60-40-13=
30-20=17-3=27-7-6=70-50+1=
68-50=79-3=17-6-5=75-40+10=
77-30=21+7=65-5-2=73-20+17=
90-80=91-7=21-6-5=83-30+1=
85-40=13+2=51-1-3=76-10+5=
66-20=80-1=21+1-6=80-40+13=
30-20=17+9=83+6-6=60-20+15=
69-10=80-6=43-6-4=90-80+17=
84-10=57-4=61-3-3=86-20+17=
40+40=18+5=74+5-5=90-70+2=
87-30=69-7=79-6-3=70-50+6=
95-50=57-5=34+6-6=64-30+5=
66-20=36-6=20-4-2=50-40+6=
40+20=52+9=85-6-9=90-70+16=
40+40=43-3=26-8-7=30-20+12=
80-10=75+4=72+2-7=67-10+12=
76-50=38+7=22-3-7=74-10+19=
60-10=84-4=51+8-7=80-60+12=
94-30=13+8=87-2-5=69-30+9=
90-30=17+2=24+1-2=80-60-10=
77-50=61+6=53+7-2=80-30+8=
67-60=23+7=73-3-1=50-10-9=
10+20=48-8=65+5-8=70-30-10=
50-40=47-8=87-9-8=74-20+1=
10+40=11-5=25-6-5=50-30-19=
40+10=17+7=42-5-2=65-30+1=
64-40=46-6=30+5-8=63-30+17=
80-60=56-5=75-1-9=80-60+19=
50+40=15-2=78+4-6=70-60-6=
30-20=19-9=30-3-5=30-20-13=
10+40=95-9=64-5-8=30-10+8=
40+30=16-9=40-9-3=80-70-17=
90-70=79-7=58-7-8=90-60+3=
75-30=71-8=51-7-2=90-80-12=
20+30=31+9=86-4-4=70-50-4=
96-40=72+9=45+9-3=69-30+6=
50+20=68-0=80-5-7=83-60+12=
64-40=21+2=18+2-7=69-50+15=
60-50=22+3=62+9-9=90-10-3=
30+40=27-3=84-8-8=80-50+5=
90-80=87+3=83-2-7=78-50+5=
30+10=40+1=57+5-1=80-50-15=
75-60=13-3=80-3-9=60-40+17=
20-10=55+2=24+1-3=90-80+1=
30+30=77-2=47-1-7=79-20+5=
79-20=33+4=86+1-4=89-40+6=
95-20=26+3=63+2-1=80-70+12=
61-60=45+8=84+1-1=80-70+7=
70-40=51-1=86+5-2=70-60-18=
99-40=61+1=16+9-1=90-70+13=
50+10=39-1=81+6-9=80-20+14=
95-10=51+8=52-7-6=60-10-2=
20+40=10+3=26+2-8=90-80+6=
78-20=81+8=73+9-3=40-10-14=
30+10=32-1=51-3-2=71-60+12=
87-30=67-6=48+1-3=76-30+14=
70-60=56+8=49-9-5=90-70+12=
30+10=63-6=11+8-8=60-40+14=
70-30=30+2=25-3-8=86-60+7=
90-80=41-0=65+7-4=73-40+14=
20+20=68+2=35-5-8=40-10+2=
83-60=49+3=16-6-4=63-20+15=
90-60=74+4=57+6-2=90-80-1=
63-10=81-8=11-9-4=60-40-7=
71-20=61-0=36+7-2=70-60+4=
90-50=19-6=22-3-9=90-70-10=
80-10=21-2=82-7-9=90-80+13=
90-50=94-2=13+7-1=30-10+7=
90-60=44+8=49+3-9=67-50+9=
10+30=14-0=38+8-1=60-50-7=
70-50=86+1=19-6-8=86-30+1=
64-30=41+2=87-4-2=64-50+17=
70-60=82+3=56-3-8=70-50-4=
73-60=63+9=61-4-5=70-20-14=
50+30=29+1=86-2-5=68-50+12=
70-50=85-4=27-7-2=67-60+18=
76-40=83+8=70+4-2=69-20+10=
90-20=91-6=42-6-5=70-60-14=
20-10=41+6=71+5-4=90-70-7=
10+30=99-4=47+7-3=85-10+16=
90-40=57-1=89-3-1=80-70-19=
50-10=20-4=33+6-7=77-40+4=
60-50=81-6=54-6-8=65-20+16=
30+30=61+2=45+9-9=80-40+13=
90-50=26+7=40-9-6=50-30+10=
69-10=22-9=89+6-7=65-50+3=
70-10=42-5=35-7-2=79-60+1=
20+20=28-9=47+3-6=79-50+20=
75-60=75+3=40+5-5=72-30+18=
50-40
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