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1、一直接写出得数1.840.5= 1.51.50.2= 578216 85.23.25 3.21/2 2/981 1/2 1/3 9/42 二用简便方法计算(5/6-1/5)30= 2.825122.5= 1/2+1/3-1/2+1/31.250.250.75= 45101= 3.3750.97+0.976.625三解方程16.9X=0.3 X0.5=2.6 35x80 一直接写出得数26.2626= 33/433/4 = 10.130= 4.576.43=7.9117.9= 3.1432= 20.22= 3/4 3/8= 二用简便方法计算0.716160.2 244564 57.26(5.26
2、1.5) 106.25+3.852.125+3.875 13.375+5.75+2.25+6.625 242/51/3三解方程0.8x-4.2=2.2 2x+5=10 3x-15=75 一直接写出得数0.12598 = 1/3-1/4= 55/7 = 4/279/16 = 22/32= 1/2-1/6 = 3/54/5 = 3/41/5 = 二用简便方法计算0.15/0.25+0.751.2 41(1/2+1/3+1/4)0.24 42(25+4)4 363/2184 0.81/0.25+5.965 4031327 三解方程1.8-6x54 6.7x60.36.7 9 4x40 一直接写出得数
3、0.9990.99 9/4 1/27= 1.5 81.5 2 82.53.25 7/107 3005-899= 7.25+2.75= 9.898 二用简便方法计算6.54+2.4+3.46+0.6 95.61.8+95.68.2 35.6420/124 344/3.6-5.40.25 16/2+30/2+90/6 5000-10534 三解方程10-x=8 8x+9=17 3.52= 4.2 x 一直接写出得数40.5= 72.1= 8.89+0.1= 240.25=0.10.01= 2.40.8= 90.4= 100.01=二用简便方法计算0.681.9+0.321.9 58+370）（64
4、-45） 420+580-642128 136+6（65-34523） 15-10.750.4-5.7 18.1（30.2990.23）1三解方程12x-8x=4.8 7.5*2X=15 1.2x=81.6 一直接写出得数123/8 = 4/53/2 = 3/7+3/5= 24.060.4= 3/8-1/3 = 4/525= 5/96= 1/126= 二用简便方法计算1253+1255+253+25 99993+10111(101-92) (23/4-3/4) (3*6+2) 3/7 49/9 - 4/3 8/9 15/36 + 1/27 12 5/6 2/9 3三解方程5x+x=9 x-8=
5、6x 4/5x=20 一直接写出得数 二用简便方法计算三解方程一直接写出得数 4/93= 51/3 = 1/21/3 = 21/2542= 4/53/4 = 8.70.2= 40.25= 1/714= 二用简便方法计算1/23/45/124/5 8/93/43/83/4 5/85/43/239/11 1.22.5+0.82.5 8.91.25-0.91.25 12.57.40.8三解方程3X-(1/2+1/4)=7/12 6.6-5X=3/4-4X 1.1X+2.2=5.5-3.3X一直接写出得数0.728= 60.03= 0.50.6= 400.9= 30.2-3.02= 4.3-0.25= 1-0.82= 9.60.3= 二用简便方法计算2/31/21/42/5 26/139/262/3 2/91/24/53/8 105/91/64 1/22/59/109/20 5/93/102/72/5三解方程(0.5+x)+x=9.82 2(X+X+0.5)=9.8 25000+x=6x
