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4年级脱式计算带答案

1、 1.25*(8+10)=1.25*8+1.25*10=10+12.5=22.52、1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.783、1/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/54、4800÷25÷4=4800÷(25x4)=4800÷100=4800÷100=485、2/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/86、3/4-

1) 311*8-8-8*112= 2) 98*100+197*98= 3) 6*3+6+194*6= 4) 12*15+12+182*12= 5) 304*10-10-10*105= 6) 17*180+17+17*17= 7) 85*82+17*85= 8) 336*20-20-20*137= 9) 398*32-32-32*1= 10) 390*166+131*390= 11) 4*40+4+157*4= 12) 560

125-25*6 (135+75)÷(14*5) 120-60÷5*5 1024÷16*3 (135+415)÷5+16 1200-20*18720-720÷15 (360-144)÷24*3 240+480÷30*2225-10*(6+13) (120*2+120)÷9 164-13*5+85 330÷(65-50) 128-6*8÷16 64*(12+65÷13) 19*96-962÷74 10000-(59+66)*

360÷[(12+6)*5] 288÷[(26-14)*8] 500*6-(50*2-80) (105*12-635)÷25 864÷[(27-23)*12] (45+38-16)*24 500-(240+38*6) [64-(87-42)] *15 (845-15*3)÷1612*[(49-28)÷7] 4

(1) 94 * 8 = (2) 57 * 6 = (3) 9 * 67 =(4) 26 * 9 = (5) 41 * 9 = (6) 57 * 3 =(7) 7 * 79 = (8) (20) 55.89 - 28.75 =四年级两位数四则运算1) 49+76+37 = (2) 28*2+84 = (3) 4÷1*1 =

156*[(17.7-7.2)÷3]=156*(10.5÷3)=156*3.5=546[37.85-(7.85+6.4)] *30=(37.85-7.85-6.4)*30=(30-6.4)*30=23.6*30=70870*〔(42-42)÷18〕=70*(0÷18)=70*0=081÷[(72-54)*9]=81÷(18*9)=81÷162=0.5960÷(1500-32*45)=960÷(1500-1440)=960÷60=16

1.95.6*18+0.4*18 =(95.6+0.4)*18 =96*18 =17282.907*99+907 =907*(99+1) =907*100 =907003.0.6*143-0.6*43 =0.6*(143-43) =0.6*100 =604.6.5*8+3.5*8-47 =(6.5+3.5)*8-47 =80-47 =335.14*2.25+14*3.75 =(2.25+3.75)*14 =6*14 =846.3.5*0.8+5.5

25*125*40*8 =(125*8)*(25*40)=1000*1000=1000000 125*18-10=125*8=1000

1+2+3+4+5+6+7+8+9+0+11+12+13+14+15+16+17=

(1) 94 * 8 = (2) 57 * 6 = (3) 9 * 67 =

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