一年级数学下册口算宝典40.docx
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一年级数学下册口算宝典40
30+40=44+5=50-5-9=65-10+15=
90-80=33-9=72-1-8=66-20+3=
63-60=58-5=54-4-2=60-30-15=
80-70=37+5=48-1-4=85-10+15=
20+10=30+8=33+7-6=66-50+4=
10+40=71-1=49-2-9=63-10+4=
80-60=24+2=26-7-2=80-70+17=
87-30=56+9=28+9-7=80-40-13=
30+30=36+7=16+8-1=70-50+12=
70-30=67+7=85+4-2=80-70+12=
50+20=27+6=36+5-9=80-30+18=
60-50=71+2=88+9-2=61-30+13=
30+30=31-2=26-8-2=74-10+12=
60-30=60+8=10-6-9=40-30-8=
60-50=18+6=41+4-9=76-10+9=
50+30=51-4=87+3-2=70-50+13=
50+10=49+5=74-3-7=69-40+19=
30+20=51+1=64+3-2=80-70+18=
76-20=54-0=71+3-5=90-60+15=
88-30=22-3=71+8-2=78-40+2=
89-60=98-8=19-4-1=90-30-11=
20+20=90+2=69+2-1=90-80+14=
83-60=12+1=26-4-6=70-60-1=
90-80=63+7=74+5-2=60-20+1=
70-60=31-0=63+3-2=79-50+3=
71-10=27+8=14-7-5=90-80+1=
50+20=59+4=50-6-2=82-20+20=
50-40=27-4=60+3-1=75-30+2=
72-40=23+9=28-5-3=69-40+2=
83-10=22+3=66-9-8=60-10+7=
90-10=75+5=58-5-9=80-70+2=
75-60=69-0=36-8-3=70-10-8=
92-40=19+6=74-3-5=78-20+9=
20+40=23-3=64+2-7=60-50-16=
40+40=94-1=90-5-2=85-60+13=
65-30=39+2=28-9-8=83-10+10=
80-20=24+6=53+6-2=73-30+12=
68-40=77+4=59+2-7=40-30+2=
50+10=63-0=37-6-5=70-10+17=
80-50=26-2=34+6-7=60-40+3=
62-20=89-3=55-4-8=90-60-6=
30+20=67-3=31+3-4=71-30+1=
80-30=45+4=23-3-3=30-10-7=
30+30=75-1=74-9-6=40-30+16=
91-50=76-4=81+5-9=74-50+16=
75-40=41-9=80-6-5=90-10-5=
78-50=25-7=84-9-3=40-10-14=
90-80=43-2=30-7-8=78-50+17=
20+30=42+4=32+6-2=85-30+18=
91-40=91-4=22+7-7=67-60+12=
90-80=32+2=90+3-2=90-60-4=
70-30=17+2=79+8-7=82-40+8=
90-70=57-4=24+8-5=81-50+18=
82-30=27-9=16-2-2=83-10+18=
81-10=92-5=50+6-3=60-50+10=
90-80=40+9=66-4-3=90-60-17=
86-30=30+5=13-3-4=83-20+18=
30+30=65-4=80+2-8=90-20+2=
70-40=57-8=60+1-5=75-60+2=
40+40=70-9=34-7-5=86-50+8=
40+40=43-6=73-9-5=60-10+3=
70-10=29+7=43-4-8=78-10+15=
20+20=65-7=82-5-8=70-60+5=
65-20=56-1=68+8-1=79-60+15=
90-60=60+5=26+3-5=90-40+17=
40+30=42+6=32-2-9=90-60-13=
50+10=42+8=19+5-3=90-40-9=
91-40=33-4=74+3-9=90-60-15=
10+30=67-2=49+4-6=40-30-15=
80-40=91-2=31-8-7=60-40+7=
99-40=20+1=40+9-8=30-10-19=
80-60=70-5=87+3-7=83-10+18=
20+20=22+5=80+7-9=30-10-9=
79-50=50-1=83+3-5=90-60-13=
60-20=15-3=20+9-3=71-30+6=
20+10=33-7=31-6-2=80-20+19=
10+10=68-4=44-8-4=74-10+17=
96-30=29+9=87-1-9=68-20+15=
80-20=22+9=40+5-2=67-50+15=
90-60=60-0=16+8-6=86-40+5=
90-20=63+9=30+3-7=77-30+16=
95-40=42-8=20+1-2=40-10+6=
20+40=85+6=34-2-6=73-30+9=
80-50=53+9=15-9-1=63-60+7=
40+10=19-9=44-4-2=90-70+2=
10+20=28+5=84+1-5=77-30+7=
72-10=98-3=48-6-5=77-50+14=
50+10=66-7=43-9-5=90-50+15=
98-60=22+8=76+7-2=80-70+14=
90-10=72-0=61-8-3=70-20+10=
40+20=40-4=62+9-1=76-40+2=
90-70=58+8=48+4-3=80-30-4=
40-30=71+2=50-6-6=90-80+11=
10+20=27-4=21-2-5=78-20+11=
10+10=25-6=34+8-4=78-20+20=
20+30=30-0=29-9-8=80-20-1=
30+40=80-2=41-5-1=90-60+15=
50+30=68-1=76+1-1=68-10+20=
68-50=65-4=74-3-9=60-10-15=
80-30=68-4=60+4-2=86-50+10=
60-20=19+7=29-9-2=20-10+16=
90-20=71-9=63+6-1=60-40-1=
84-40=78-5=60-2-1=66-40+12=
50+20=22+4=75+9-9=80-30-19=
95-10=34+4=33+8-8=76-20+17=
40+30=71-7=88+7-6=90-70+4=
95-10=29-4=13+3-2=71-40+8=
50-20=64+3=68-2-7=70-20+1=
40+30=65+7=14-4-3=63-30+15=
90-80=16-9=63-8-3=90-70+5=
61-10=59-8=20-9-2=76-30+12=
30+10=87+2=87-7-9=64-30+8=
40-30=55-3=76-2-4=74-60+11=
89-10=48-2=49-1-2=79-10+14=
90-40=41+6=61-7-5=68-50+5=
91-50=17+7=43-4-9=76-60+2=
20+10=87+7=47-3-2=79-20+2=
40+20=43-9=26+1-4=60-40-18=
60-40=59-6=67+3-6=90-50-14=
80-70=28+8=15+3-2=77-10+9=
90-70=65+9=34+5-7=83-30+14=
83-30=33+2=80-9-2=67-50+18=
65-20=36+5=58+5-9=60-50-19=
30+10=89+6=28-5-6=90-80+13=
30+20=31+3=43+3-4=70-50-19=
10+20=22+1=36-4-7=60-30-5=
73-50=90+1=50-1-3=40-10-18=
10+40=77+3=89+2-1=77-20+14=
30+40=24-0=47+1-6=76-10+14=
70-20=68+2=53+8-9=90-20+12=
80-30=78+3=23-7-7=88-10+13=
90-40=90+4=84-7-5=63-20+5=
80-50=90+1=60-2-9=80-70+11=
85-60=26+5=74+5-1=90-40-18=
20+30=90+1=60-6-1=63-50+13=
77-40=72-0=14-6-5=69-30+14=
70-40=55+4=54-9-6=50-10+14=
72-10=57+9=47+3-2=77-30+19=
50+40=88+8=89-3-2=90-70+3=
20+40=81+6=55-3-4=64-40+14=
67-60=32-3=51+1-7=90-30-10=
40+40=17+4=70-8-6=82-50+2=
82-30=23-3=59-7-3=85-20+10=
90-50=70-4=68+9-4=69-50+20=
9