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1、二年级下册数学口算练习题口算练习（一）12-369= 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+35
2、=926= 217+49=1558= 67+71=64+74= 4272=58+32= 87+142= 31-102= 7+49=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= 63-243=29+305= 62+30=1234= 78+42=305+77= 98-93= 82-47= 19+9
3、2=67+93= 84+48=384= 2558=43-94= 17+49=21-0= 19+28=842= 243+28= 45+15= 426+77=口算练习（二）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=
4、279-3=(77-14)7= 99-66= 2797= 153+69=48(22-16)= (3+9)6= 61-55= (19+9)7=(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+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=
5、 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= 97-11= 7(13-9)=8(24-16)= (5-2)3= 57+47= 92+51=21(24-17)= 18+213= 88+369= 92-74=36-183= 51-49= 15(5+0)= (5+3)3=84-98= (8+1)5= (9-5)4= (9-1)8=口算练习（三）(2+6)7= (23+4)9= 71+36= 63-2=
6、3(11-4)= 729-7= 19-355= 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)=4(14-1
7、0)= 49-63= (9-6)9= 40-57=91+83= (4+3)7= 74+64= 1837=16(11-9)= 366+29= 60-189= 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= 264= 43-102=84-82= 42(2+4)= 33-305= 7(5+4)=(73-19)6= 72-155= 61-95= 84-459= (11-6
8、)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= 6(2+1)= (7+9)8=口算练习（四）36(19-13)= 64+244= (23+25)6= 405-5=(36-0)6= 2(13-4)= (6+9)5= 284+43=11+87= 24(5+1)= 48+244= 19+67=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
9、= 72-204=(19+9)7= (14+2)8= 72-59= (7+2)3=5(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=30(21-16)= 5(186)= 89+31= 4(5+4)=25(22-17)= 2482= 58-21= 35-7=55+16= 296= 76+21= 3(3-0)=(2-1)9= (33
