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1、、口算300 x 6=15x 8=23x 30=51-3 =24x 3=34 x 2=15x 5 =4907 =21x 3=15x 6=120-6=25x 4=14x 5=30x 60=17x 3=25x 40=125x 8=13x 5=14x 4=75x 4=308x 7=105x 30=1200宁4=5x 17=48-3=90x 6=1400x 5 =12x 8=92-2 =150x 4=3200x 2=24x 20=28x 3=6x 13=6505 =900-6=10x 47=12x 20=18x 2=84-3=1900x 5=720宁4=50x 70=26x 30=18x 4=36x
2、20=4x 250=160x 2=480-2 =50x 60=48 - 4=18x 3=6x 800=110x 8=130x 5=400-8=420-3 =9015=3x 24=48 16=11 x 40=53+26=99-9=86-2=700x 2=6x 11=8337=9034 =2x 23=2x 120=329=60x 3=50-2=22x 4=666=71 7=400-2=90-3=69-3 =62-2=28 17=30x 8=800宁4 =13x 2=20x 4=6436=31x 2=36-3=84宁4 =1407 =15x 4=9x 80=15x 40=49x 10=150x 2=
3、56x 10=42x 30=30x 20=31x 30=4x 60=5x 60=20x 10=8x 70=7x 40=27x 30=10x 10=6x 30=150x 4=16x 40=50x 30=70x 3=703=60x 40=35x 20=64宁4=3650=40x 50=186=200x 30=42x 4=637=230x 20=130x 3=60x 50=150-3 =260x 2=7526=21x 40=35x 20=15x 80=29+49=500+300=400X4 =4X 700=800+300=60+17=4000+300=72-8=15X 4=4700700=88 -
4、8=7300+400=12X 3=72-7=63-7=200 X 8=110X 4=3X 310=950 X 0=110X 1=402 X 2=25+18=25+43=3700+3000=500X 6=6500300=21 X 3=6700+200= 7X 600=600X 3=500X 4=350 X 4=61-3=44-2=903-3=8549=68+17=8434=44+46=300+800=6539=1100 500=5036=7144=900X 4=220X 4=500 X 3=120X 3=25+37=50X 60 =7X 9+4=6X 9+8=7X 8+4=9X 4+6=6X 6
5、+7=36 X 20=4 X 250=160X 2=480- 2 =48宁4=18X 3=6X 800=110X 8=130X 400-8 =420-3=90 15=3X 24=11X 40=53+26=99 - 9=86 - 2=700X 2=4816=50X 60=6X 11=8337=9034=2X 23=29+49=500+300=400 X 4=4X 700=800+300=2X 120=60+17=4000+300=72-8=15X 4=88-8=7300+400=12 X 3=72-7=63-7=4700700=4= =10 =+=+=+=3005=7209=6500300=21
6、 X 3=6700+200= 7X 600=500X 4=350X 4=61- 3=44-2=903-3=600X 3=12040=402 X 5=25X 4=450X 0=36090=630X 3=56040=7224=950=630 70=24X 5=70 X 8=250X 5=1440=880X 2=5728=801 X 9=120 20=250X1=2868=30 x 6=18 x 3=902x 1=17x 4=68 4=70 x 2=200 x 8=280 70=320x 8=30 x 6=1405=125 x 8=560 80=150x 2=700 x 2=4230=902 x 6
7、=590 70=800x 5=440 x 0=303x 3=12 x 2=47070=64x 0=25 x 8=20x 6=90 x 3=420 x 6=28040=55 x 5=4816=120 x 5=40 x 8 =100x 0=11 60=2516=72 x 3=180 60=72x 6=48x 4=12040=402x 5=25 x 4=450x=360 90=630x 3=56040=72 24=950=63070=24x 5=70x 8=250 x 5=1440=880x 2=5728=801x 9=120 20=250x 1=28 68=30x 6=18 x 3=902 x 1
8、=17x 4=68 4=70x 2=200 x 8=28070=320x 8=30 x 6=1405=125 x 8=56080=150x 2=700x 2=4230=902x 6=590 70=800x 5=440 x 0=1405=125 x 8=56080=150x 2=700 x 2=4230=902 x 6=590 70=800x 5=440 x 0=303x 3=12 x 2=47070=64x 0= ,25x 8=20x 6=90 x 3=420 x 6=28040=55 x 5=12040=402 x 5=25 x 4=450x 0=360 90=630x 3=560 40=7
9、224=950=630 70=24x 5=70 x 8=250 x 5=1440=880x 2=5728=801x 9=12020=250x 1 =2868=30x 6=18x 3=902 x 1=17x 4 =684=70x 2=200 x 8=280 70=320x 8 =30 x 6=303x 3=12 x 2=47070=64x 0=25 x 8=20 x 6=90x 3=420x 6=280+ 40=55 x 5=11 + 60=120x 5 =40x 8= 1100x 0=48 16=18060=72x 3=25+ 16=72x 6=48x 4=11+ 60=120x 5 =40x
10、 8=100x 0=48 16=18060=72x 3=48x 4=72x 6=25+ 16=34x 3=312x 5=605x 4=270x 8=36x 6=156x 3=509x 7=320x 5=64x 8=357x 3=305x 5=180x 4=364x 3=128x 4=49+162=184+360=641+368=357+343=404x 7=334x 5=249+96=482+349=460+463=167+467=264+98=751+249=624+249=816+267=315+67=157+946=69 - 8=346=16宁4=356=21-5=27-3=18-5=4
11、26=862+158=315+767=21-7=65-9=35-5=72-8=32宁4=36 - 9=50-7=53-8=125-5=351-128=327-69=461-167=507-694=200-49=168-74=591-467=207-154=800-467=600-248=809-348=75 +21=6957=49 +37=8125=25x 3=268+125=280+40=6622=46x 20=40 - 8=70+ 550=800x 6=500x 4=540-9=14x 5=35080=570+ 50=23x 3=180-3=200x 8=53070=850x 2=26380=850-2=98+ 26x 0=102x
