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1、数学计算题、简便计算题12.3X4X0.2512.96(9.61.52)85X10.11.2-0.25+1.3X4103X0.25(4.8+6.4)-835-12540.5-0.81X1.0534.5X0.03+34.5X0.97(203.4+72.2)-(1.3X0.2)8X4.3x12.597.5-0.39136.70.125x1612.6-3.5(9.88.7)2.5x10286.4-0.24x0.254.2-2811.16-(100.7)(9.6+3.2)-0.8(30094.8)-0.53.2X5.611.40.648-(0.4+0.5)X0.64.8X0.258.05X3.4+7.
2、65.74X995.7489X1.1X4.74.75+3.25X2.4+7.62.7X5.4X3.93.8X1.4+18.2-0.73.6X9.85-5.464.7X10.26.58X4.5X0.91.5X1029.8X25X47.63X997.632.8X0.5+1.586.732.561.443.278X5.2+3.8X3.8+3.82.37X2.5X4(6.7+6.7+6.7+6.7)X2.52400-16-0.532X0.25X0.1250.65X2017.2X0.9+0.01X7.22.8X3.2+3.2X7.27.40.15X2.83.76X0.250.490.008+0.92X5
3、1.280.25X4.78X47.8-(1.3X4)1.2X2.5+0.8X2.58.6X10.12.5X7.1X45.6X(12.58.5-0.85)16.12X99+16.12(8.15.6)X0.91X0.44.3X50X0.24.32+5.43+6.685.2X0.9+0.98.25X4.08+0.75X4.08+4.0864-2.64X0.515.176.83.226X15.715.7X2412.75-(2.756.8)1.2X(9.6-2.4)-4.86.75-(0.93.75)(2.2750.625)X0.281.273.90.7316.13.94+34.3X0.212.8-4.
4、9-5.18.9x1.1x4.71.341.83.660.26.58x4.5x0.935.72-4.9-(5.72+5.1)2.7x5.4x3.90.960.280.040.723.6x9.85-5.468.05x3.4+7.612.78-(4.97+2.78)31.70.5x0.71.652.8X0.5+1.581113.67X2.83.67X7.2324.90.912.5 X6.3+27X1.25+0.125-0.013.1+25.78+6.94.84.8X0.5(1.250.125)X815.25+4.72+4.75+5.284.8X100.134.82(4.82+15.2)56.5X9
5、9+56.57.28+0.94+2.72+0.067.09X10.80.8X7.097.84+0.730.844.85+0.35-1.46.3X99+6.38.7X17.4-8.7X7.415.74.35.712.5X0.4X2.5X81.6+0.41.6+0.40.87X3.16+4.6462.8-2.5-0.47.3X999.5X1014.8X(15-2.4)1.8X2.48+1.52X1.8-0.50.68-(5.2-3.5)X1.25(1.25+2.5)X840.5 -0.81X0.189.42X1094.2X0.92.13.X0.X82578.76+0.4X3.6X2.5+1.246
6、.81+6.81X996.5 X(10-3.7)+2.98(9.37+9.37+9.37+9.37)X2.50.125X7.9X160.25X185X404.75+8.4-(9.2-6.8)X404.4X0.83.4X0.819.8-0.6X0.6-0.644.2.x1.+1.x1.752.48x(7.3-5.8)+1.5x7.522.5x(3.8x0.04)2.18+4.65+7.82+5.35+12.52.37x6.3+2.37x3.712.773-4.5x(0.75-0.356)+9.232.5x1.25x0.32(6.4+0.88)-0.8+3.2x1.253.8x10.124-:5.
7、4+(0.63+1.29-0.23)7.69x10115.84-2.17-3.833.8x10.1(25+2.5+0.25)x40.25x39+0.25(35.2x45.6+45.6x63.8+45.60.125x7212.253.10.856.1746x0.33+54x0.33(1.91.9x0.9)-(3.82.8)二、用竖式计算1.8+0.02=5.76X3=2.08X7.5=0.72+0.9=90.75+3.31.05X2.4=0.2+0.01=16.9+0.131.89-0.54=0.25X40=3.7X0.0165.61+6.1=0.43X0.28=4.6X0.6=3.08X0.4
8、3=5.22+29=1.25X0.8=5.2X0.66.21+0.3=13.95+3.1=5.5X66=6.4X0.51.3+0.95.93X0.767.8X0.35=5.25X521.84-0.732.088.4X0.25=0.042X0.5428.14-6.73.54X134.1-1.2980.25X0.0460.396+1.2=205.6746.84X7.451.08X2515.6X13=5.4+0.03636.72-2.40.125X1.40.025X14=5.778-5.4=110.7-0.5410.1+3.3=0.04X0.12=1.5X0.25=1.204-0.43=3.25X9
9、.04=6-1.2=9.2+2.3=3.5X0.2=7.15X2218.9-0.54=6.45X0.73=4.8+2=1.55+3.90.35X8.6=1.5X26.7=3.5X24=8.4X1.354-0.36=7.218+364.25X24=35.4X4.20.462-1.45.24-7.25.24-7.22.52X3.40.756+0.36=5.84+0.1687.11+3.12.5-0.7=3.06X36=8.02X3.5=1-0.01=3.68X0.251.44-1.8=8.9X0.05=7.6X1.05=4.48X0.45.86+0.2416.32+515.56+0.834.8X0
10、.25=0.18X15=8-116.5-5.6=13.76X0.8=9.58+0.23=18.72+3.6=2.84X0.05=10.75-12.5=3.84X2.628.56+5.1=0.42X0.3080.76X0.324.32+3.62.7+3.13(5)18X5.5三、速算与巧算(1) 5.8+2.32+0.68+4.2(2) 1999+199.9+19.99+1.999(3) 12.59-3.24-5.76(4) 8.1+7.8+8.2+8.4+7.9+7.7(6) 8.88X1.25(7) 34.7X0.25(8) 238-1.25(9) 0.25X12.5X3.2(10) 124.68+324.68+524.68+724.68+924.68(11) 5795.5795+5.7957X579.5(12) 1990X198.9-1989X198.8(13) 2.25X0.16+264X0.0225+5.2X2.25+0.225X20X(0.28+0.84)(14)(
