口算题大全.docx

口算题大全2.80.4 1.12 147.46.6, 1.920.0448, 0.32500160, 0.654.35 5 105.44.6, 4200.2, 3.5200700, 1.50.061.44 0.75150.05, 0.40.80.32, 40.251, 0.361.542 1.019999.99, 4203512, 2512300, 1350.5270 3/4 + 1/4 =1, 2 + 4/9 =22/9, 3 - 2/3 =7/3, 3/4 - 1/2= 1/4 1/6 + 1/2 -1/6 =1/2, 7.5-(2.5+3.8)=1.2, 7/8 + 3/8 =5/4 3/10 +1/5 =1/2, 4/5 - 7/10 =1/10, 2 - 1/6 -1/3 =1.5 0.51170.03, 32.81951.8, 5.21.34, 1.60.4 0.64 4.90.73.43, 150.2, 6120.5, 0.870.490.38 1.(1+1/2)(1+1/3)(1+1/4).(1+1/100) 2.(1-1/2)(1-1/3)(1-1/4).(1-1/100) 3.8+2-8+2 4.25*4/25*4 5.7.26-(5.26-1.5) 6.286+198 7.314-202 8.526+301 9.223-99 10.6.25+3.85-2.125+3.875 11.9-2456*21 12.0.5/11.5-4*2.75 13.1/23/5 14.3.375+5.75+2.25+6.625 15.1001903618 16.3.85.25+14.5 17.2.1*4.3+5.7*2.1 18.301/3 19.102*45-328 20.2/312 21.2.8*3.1+17.6/8 22.3/55/6 23.(50-12.5)/2.5 24.2/51/3 25.6110*47+639 26.1/2-1/6 27.3.5*2.7-52.2/18 28.1/71/5 29.3.375*0.97+0.97*6.625 30.254/5 31.6.54+2.4+3.46+0.6 32.5/6-1/2 33.95.6*1.8+95.6*8.2 34.1/21/5 35.600-420/12 36.344/3.6-5.4*0.25 37.16/2+30/2+90/6 38.3001-1998. 39.5000-105*34 40.0.15/0.25+0.75*1.2 41.(1/2+1/3+1/4)*0.24 42.(25+4)*4 43.300-4263/21 44.0.81/0.25+5.96 45.4031327 46.1.54.20.750.25 47.3.274 +3.275.7 48.（1.2+ 1.8）4.5102576832 49.0.25800.450.9 50.102576832 51.0.25*2.69*4 52.2348+275*16 53.2/9*15/8-1/12*9/5 54.2.4+2.4*(5.375-3.375) 55.645-45*12 56.0.15+1.2/0.24-0.45 57.3.75-(2.35+0.25/1.25) 58.76*1/4+23*25/100+0.25 59.10-2.87-7.13 60.0.96+9.6*9.9 61.7.5-5.7*1/3 62.12.37-3.25-6.75 63.16*6.8+2.2*16+16 64.401*19+284 65.58.7-16.65/3.7 66.0.4*4.7*2.5+(2.3+5.3) 67.9.31-1.125-7.875 68.640+128*45 69.8.2*1.6-0.336/4.2 70.400*(0.62+0.08) 2/1*2=1 3/1*3=1 3/2*3=2 3/1*6=2 4/3*8=6 5/3*20=12 7/3*14=6 8/7*40=35 4/3*16=12 9/5*27=15 2/1*30=15 12/7*24=14 30/1*30=1 51/9*102=18 19/9*76=36 4/9*8=18 5/8*90=144 99/98*99=98 3/14*6=28 7/1*28=4 10/1*90=9 5/3*105=63 19/7*38=14 5/1*25=5 8/19*16=38 61/60*122=120 7/2*28=8 6/1*48=8 9/7*18=14 25/7*100=28 9/5*81=45 8/9*16=18 2/1*2=1 3/1*3=1 3/2*3=2 3/1*6=2 4/3*8=6 5/3*20=12 7/3*14=6 8/7*40=35 4/3*16=12 9/5*27=15 2/1*30=15 12/7*24=14 30/1*30=1 51/9*102=18 19/9*76=36 4/9*8=18 5/8*90=144 99/98*99=98 3/14*6=28 7/1*28=4 10/1*90=9 5/3*105=63 19/7*38=14 5/1*25=5 8/19*16=38 61/60*122=120 7/2*28=8 6/1*48=8 9/7*18=14 25/7*100=28 9/5*81=45 8/9*16=18 123/5=12(5/3） 96/7=9( 7/6 ) 305/6=30（6/5 ） 4（3/2 ）=42/3 45/7=47/5 34/5=35/4 247/16=24（16/7 ） AC/B=AB/C 44/5=5 63/4=8 102/5=25 184/9=81/2 44/5=16/5 63/4=18/4 102/5=4 184/9=8 33/4=4 21/3=6 64/5=15/2 15/7=7/5 3/43=1/4 1/32=1/6 4/56=2/15 5/71=5/7 2/1*2=1 3/1*3=1 3/2*3=2 3/1*6=2 4/3*8=6 5/3*20=12 7/3*14=6 8/7*40=35 4/3*16=12 9/5*27=15 2/1*30=15 12/7*24=14 30/1*30=1 51/9*102=18 19/9*76=36 4/9*8=18 5/8*90=144 99/98*99=98 3/14