Question

4x口=20一8。4x口=24-7。4x口=28-6

Answer 1

17×40＝680, 100－63＝37, 3.2＋1.68＝4.88, 2.8×0.4＝ 1.12 14－7.4＝6.6, 1.92÷0.04＝48, 0.32×500＝160, 0.65＋4.35＝ 5 10－5.4＝4.6, 4÷20＝0.2, 3.5×200＝700, 1.5－0.06＝1.44 0.75÷15＝0.05, 0.4×0.8＝0.32, 4×0.25＝1, 0.36＋1.54＝2 1.01×99＝99.99, 420÷35＝12, 25×12＝300, 135÷0.5＝270 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 0.51÷17＝0.03, 32.8＋19＝51.8, 5.2÷1.3＝4, 1.6×0.4＝ 0.64 4.9×0.7＝3.43, 1÷5＝0.2, 6÷12＝0.5, 0.87－0.49＝0.38 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 13.1/2×3/5 14.3.375+5.75+2.25+6.625 15.1001－9036÷18 16.3.8×5.25+14.5 17.2.1*4.3+5.7*2.1 18.30×1/3 19.102*45-328 20.2/3×12 21.2.8*3.1+17.6/8 22.3/5×5/6 23.(50-12.5)/2.5 24.2/5×1/3 25.6110*47+639 26.1/2-1/6 27.3.5*2.7-52.2/18 28.1/7×1/5 29.3.375*0.97+0.97*6.625 30.25×4/5 31.6.54+2.4+3.46+0.6 32.5/6-1/2 33.95.6*1.8+95.6*8.2 34.1/2×1/5 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 45.403÷13×27 46.1.5×4.2－0.75÷0.25 47.3.27×4 +3.27×5.7 48.（1.2+ 1.8）×4.51025－768÷32 49.0.25×80－0.45÷0.9 50.1025－768÷32 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=18 123+25=148 123-35=88 56×7=392 135÷5=27 248+89=337 ... 146-23=123 ... 155×5=775 ... 456-12=38... 456+45=501 ...546-457=89 ... 45×10=451 ... 564-12=47... 879+54=933 ...896-546=350 ...56×12=672.... 45-5=9... 457+456=913... 脱式计算 30.8÷[14－(9.85＋1.07)] [60－(9.5＋28.9)]÷0.18 2.881÷0.43－0.24×3.5 20×[(2.44－1.8)÷0.4＋0.15] 28-(3.4+1.25×2.4) 2.55×7.1+2.45×7.1 777×9+1111×3 0.8×〔15.5-(3.21+5.79)〕 （31.8+3.2×4）÷5 31.5×4÷(6+3) 0.64×25×7.8+2.2 2÷2.5+2.5÷2 194－64.8÷1.8×0.9 36.72÷4.25×9.9 5180－705×6 24÷2.4－2.5×0.8 (4121+2389)÷7 671×15-974 469×12+1492 405×(3213-3189) 3.416÷（0.016×35） 0.8×[(10－6.76)÷1.2] 19.4×6.1×2.3 5.67×0.2-0.62 18.1×0.92+3.93 0.0430.24+0.875 0.4×0.7×0.25 0.75×102 100-56.23 0.78+5.436+1 4.07×0.86+9.12.5 30.8÷[14－(9.85＋1.07)] [60－(9.5＋28.9)]÷0.18 2.881÷0.43－0.24×3.5 20×[(2.44－1.8)÷0.4＋0.15] 28-(3.4+1.25×2.4) 2.55×7.1+2.45×7.1 777×9+1111×3 0.8×〔15.5-(3.21+5.79)〕 （31.8+3.2×4）÷5 31.5×4÷(6+3) 0.64×25×7.8+2.2 2÷2.5+2.5÷2 194－64.8÷1.8×0.9 36.72÷4.25×9.9 5180－705×6 24÷2.4－2.5×0.8 (4121+2389)÷7 671×15-974 469×12+1492 405×(3213-3189) 3.416÷（0.016×35） 0.8×[(10－6.76)÷1.2] 19.4×6.1×2.3 5.67×0.2-0.62 18.1×0.92+3.93 0.0430.24+0.875 0.4×0.7×0.25 0.75×102 100-56.23 0.78+5.436+1 4.07×0.86+9.12.5 简算是乘号 /是除号 0.3*2.5*0.4 50*0.13*0.2 0.8*630*0.125 0.78*101 1.5*102 9.8*25 1.2*2.5+0.8*2.5 1.25*0.7*0.8 0.038*5*2.1 3.8+4.5+6.2 93/0.31/3 3.25－0.84-0.16 88*0.25*4 2.8*3.6+1.4*2.8 63*10.1 （3.2+0.128）/0.8 9.83*1.5+6.17*1.5 10.1*87 312*4+188*4 0.135*500*0.2 6.3+0.84+3.7+8.16 18.75-0.43-4.57 0.25*0.03*4 13.7*0.25*8 2.65*1.7+1.35*1.7 32.8+5.6+7.2 （2.5+0.25）*0.4 8*（2.5*0.25） 8.4*0.2+1.6*0.2 1.25*0.8*0.5 （1.5+0.25）*0.4 1.2*0.4+1.3*0.4 方程 9+6x=14 x+9x=4+7 2x+9=17 8-4x=6 6x-7=12 7x-9=8 x-56=1 8-7x=1 x-30=12 6x-21=21 6x-3=6 9x=18 4x-18=13 5x+9=11 6-2x=11 x+4+8=23 7x-12=8 X-5.7=2.15 15 5X-2X=18 3X 0.7=5 x＋13＝33 3 － 5x＝80 1.8 +6x＝54 6.7x －60.3＝6.7 9 ＋4x ＝40 2x+8=16 3.5×2= 4.2 x 26×1.5= 2x 0.5×16―16×0.2=4x 9.25－X=0.403 16.9÷X=0.3 X÷0.5=2.6 3－5x＝80 1.8-6x＝54 6.7x－60.3＝6.7 9 ＋4x＝40 0.2x－0.4＋0.5＝3.7 9.4x－0.4x＝16.2 12－4x＝20 1/3x＋5/6x＝1.4 12x＋34x=1 18x－14x=12 23 x－5×14=14 12＋34x=56 22－14x=12 23x-14x=14 x＋14x=65 23x=14x＋14 30x12x－14x=1 x-0.7x=3.6

Answer 2

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Answer 3

3 17/4 11/2