有興趣者可以算算看， 改天我會社有專門位珠算打造的活頁夾， 從二級的開始。， 請再忍耐一幀子亂七八糟的吳分類珠算吧！哈哈！ 第19回 1.$83.61*405=$ 2.$9.18*703.5=$ 3.$51.03*828=$ 4.$5.43*210.7=$ 5.$5.06*947.9=$ 6.21*99524= 7.7.638*612= 8.0.846*93.72= 9.2639*817= 10.64007*0.54= 11.$41.53*483=$ 12.$83.92*501=$ 13.$3.68*7169=$ 14.$6.52*294.6=$ 15.$706.08*6.5=$ 16.2908*739= 17.0.0918*7346= 18.54*72.231= 19.407*1008= 20.0.5475*0.912= 1.$4647.78/5.4=$ 2.$4008.76/973=$ 3.$1938.02/254=$ 4.$343.13/8369=$ 5.$491.23/50.8=$ 6.139/201= 7.822296/872= 8.7.056/2.016= 9.261087/87= 10.0.29665/0.425= 11.$875.27/803=$ 12.$827.75/86.1=$ 13.$1925.58/958=$ 14.$15.41/1.62=$ 15.$4781.01/943=$ 16.197892/956= 17.0.37276/6.427= 18.31980/7.5= 19.302436/8401= 20.0.277587/0.081= 1.$1826.79+653.04+2798.41+8067.53+412.96+570.38+9035.17+264.80+5789.63+401.25=$ 2.$127.04+6345.97-902.13-1476.58+284.30+619.25+7430.86+2851.49+9063.72-598.31=$ 3.$617.95+340.86+9081.57+274.03+4139.68+750.12+3582.69+605.74+5798.21+7826.30=$ 4.$2935.06+6192.84+749.63-350.17+8024.39-617.45+391.20-1574.68+8203.95+481.72=$ 5.$7512.39+485.06+2679.18+123.45+896.73+7054.28+5160.94+6037.80+981.52+304.67=$ 6.$724.01+1538.69+9402.73+281.54+7650.38+3149.62+297.18+345.90+816.27+6093.45=$ 7.$612.75+5384.16+179.02+865.37-2590.84-731.60+6048.59-817.23+9256.40+4703.98=$ 8.$248.17+6820.34+179.52+463.08+2051.79+8926.34+134.95+702.86+9517.43+1395.60=$ 9.$714.20+628.59+4503.78-396.01+6872.45+150.97-3081.62+5297.34-460.81+8935.76=$ 10.$974.02+6285.94+310.87+592.61+2143.50+867.49+1703.25+9318.46+259.73+3046.18=$ |
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