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1、二年级下册口算训练欧阳光明（2021.03.07）1221054971892731822171021243661646391834262448 46481866 22 12057 72481472871265677281552433064274053692793642552131422 21238 24 13554889 36 32041686 13244 42844861623577295468 87 13573661 11052132481682871268 44885 54081533059 94 25 16373245684593057281234261471836391556 320
2、424635532824656845981945512-369= 1243= 5685= 147+68= 58+357= 94+56= 98-15= 21+41=42+23= 29+27=426+35= 6486=55+39= 75+44=357+57= 17+88=22-205= 68-79=97-32= 328-1=66-62= 81-287=549+37= 213+75=442= 168-1=24+122= 37-12=50-93= 279-3=93+63= 83-99=83-255= 27+51=75+7= 408-1=32-82= 4089=263= 36+81=84+29= 61+
3、35=926= 217+49=1558= 67+71=64+74= 4272=58+32= 87+142= 31-102= 7+4 9=6393= 65-162=78-21= 77+328=95-69= 3067=57+58= 189-1=6484= 96-34=88+9= 95-497=16+96= 496=39+408= 7298=30-34= 45-59=93+27= 77+45=73-71= 83+38=1559= 39-427=55-17= 79+405= 51-164= 63-24 3=29+305= 62+30=1234= 78+42=305+77= 98-93= 82-47=
4、19+9 2=67+93= 84+48=384= 2558=43-94= 17+49=21-0= 19+28=842= 243+28=45+15= 426+77=38-729= (9-2)7= (9+0)6= (51-6)9=28(16-9)= 99-84= (5-2)7= (9-5)8=(29+19)8= 53-328=4083= 35-47=7(11-6)= 3(6+3)= (10-3)7= (10+8)9=72(42)= 54-11=4(23-17)= 57+56=25(31-26)= 2(8-1)= 79+567= 23+18=(27-15)3= 61+46= 89-99= 97-11
5、= 7(13-9)=279-3=(77-14)7= 99-66= 2797= 153+69=8(24-16)= (5-2)3= 57+47= 92+51=21(24-17)= 18+213= 88+369=48(22-16)= (3+9)6= 61-55= 92-74=(19+9)7= 36-183= 51-49=(13-7)3= 4(11-4)= 17+39= 287+57=8(21-19)= 613= (4-1)8= 34+58=(51-11)5= 24+56=8(11-7)= 34+29=63-243= 80-68= 65+122= 44-213=28(2+2)= 6(14-5)= 89
6、+153= 56(3+5)=27(19-16)= 28(11-4)=24(2+2)= 49+168=65+28= 35+38= (4+23)3= 31-126=74+29= 4264=815= 8(11-5)=77+497= (7-1)9=1269= 84+27=6(4+5)= 9(13-5)=54(4+5)= 946=4276= (38-2)6= 48+29= (19+5)8=28+164= 45-28=15(5+0)= (5+3)3=84-98= (8+1)5= (9-5)4= (9-1)8=(2+6)7= (23+4)9=71+36= 63-2=3(11-4)= 729-7= 19-35
7、5= 355-7=49(13-6)= 70-66= 63-46= 89+11=8(20-16)= (51-3)8=5(6-0)= 62+39=(41+22)7= 33+19=729+85= 78+22=(30-20)5= (50-8)7=238= 32-71=5(12-3)= 637= (8-5)9= 62+68=8(18-9)= 5465= 17+123= 96-37=1534= 83-89= 70-49= 24+88=(13-6)5= 77+324=629= 87+279=(12-9)8= 632= 1478= 3(1+2)=6(2+1)= (7+9)8=36(19-13)= 64+244
8、= (23+25)4(14-10)= 49-63= (9-6)9= 6= 405-5=40-57=91+83= (4+3)7= 74+64= 1837=(36-0)6= 2(13-4)= (6+9)5= 284+43=11+87= 24(5+1)= 48+244=16(11-9)= 366+29= 60-189= 19+67=7(2-2)=(29-15)7= (18-9)5=5(11-3)= 1535=72(16-7)= 9124=85-3= 3064=(21+3)3= 62-27=497+35= 549+28=28+32= 82-38=7(5-5)= 4057=20(2+3)= 4865=2
9、64= 43-102=84-82= 42(2+4)= 33-305= 7(5+4)=(73-19)6= 72-155= 61-95= 84-459=(11-6)6= 94-96=4(10-1)= 4083=(54-0)9= 2043= (60-12) 8= 99-45=244+47= 425= (6+8)7= 55+26=57-24= 1246=27(10-7)= 15(2+3)= (6+10)4= 366+34=243+23= (8-1)6=98+69= 86-69=(6+6)3= 99-12= 78+86= 72-204=(19+9)7= (14+2)8= 72-59= (7+2)3=5(
10、13-4)= 48(9-3)=9(17-8)= 164+67=18(24-18)= 189+48= (44-8)4= (1+8)6=14(2-0)= 36(5+4)= (20+5)5= 17+32=(14+16)6= 38+366= 68+217= 162-8=4977= (17+1)6= 90-99= 81-279=204+77= 26+567=8(13-8)= 497+39=77-35= 2876= (2+16)3= 56-23=(16+19)5= 21+98= 4(9-0)= 78+36=20( )=5 ( )2=2 24( )=3 14( )=230(21-16)= 5(186)= 89+31= 56=( ) ( )7=214(5+4)=25(22-17)= 2482=58-21= 35-7=55+16= 296=76+21= 3(3-0)=(2-1)9= (33+3)9=6(12-6)= 96-5=49+14= (3+9)6= 54-648= 63+37=24(2+6)= 92-75= (66+15)9= 45+71=(13+17)6= (5+7)4= 91-98= 81-94=55-14= (7-1)4= 27-29= 35+37=10(17-12)= 51+18= (37-7)5= 73-4=32(18-14)= 42(5+1)= (5+2)7= 279+69=3
