Matematică, întrebare adresată de lumistefan79, 9 ani în urmă

va rog frumos ajutati-ma si pe mine la cateva exercitii: 1)300-(27x4+46x2):10+10-10= 2)5x(395+638+437):6+9-(12+3)= 3)[(4x81-32)x2-(200-86)]:10= 4)[(99:9)-1]x[69-(23x15:5)]+5= 5)[(105x3+138):3]+45+104= 6){[(7x9-13)+6x4]:2+(200-143)x6}= 7)31x{[(111+333+555):9-28]+3}:2= 8){[(12x6)-(132:2-72:6)]x3}-4= 9)14x{[(96:3x16)x(50-50)]x1000}= 10){[(455:5)+9]:10+2000-143}+(3+2)= 11){[12x5-(99:9-70:7)x5]:5-1}x74= 12)30+{32:8+5x[8x(20:2-70:10)]}:2= VA MULTUMESC FRUMOS SI UN PASTE FERICIT VA DORESC

Răspunsuri la întrebare

Răspuns de SaraSàràrica
0
300-(108+92):10=300-200:10=100:10=10

Loreen19: nu se face scaderea inainte de impartire
Răspuns de Loreen19
3
1) 300-(27×4+46×2):10+10-10=300-(108+92):10{+10 cu -10 se reduc}= 300-200:10= 300-20=280 ; 2) 5×( 395+638+437):6+9-(12+3)= 5×1470:6+9-15= 5×245+9-15=1225+9-15=1219 ; 3)[(4x81-32)x2-(200-86)]:10=[( 324-32) ×2-114]:10= (292×2-114):10= (584-114):10= 470:10= 47 ; 4)[(99:9)-1]x[69-(23x15:5)]+5=(11-1)×[69-(23×3)]+5=10×(69-69)+5=10×0+5= 0+5 = 5 ; 5)[(105x3+138):3]+45+104=[(315+138):3]+149= (453:3)+149=151+149=300 ; 6){[(7x9-13)+6x4]:2+(200-143)x6}=[(63-13)+24]:2+57×6= (50+24):2+342= 74:2+342=37+342= 379 ; 7)31x{[(111+333+555):9-28]+3}:2= 31×[(999:9-28)+3]:2=31×[(111-28)+3]:2= 31×(83+3):2=31×86:2=31×43=1333 ; 8){[(12x6)-(132:2-72:6)]x3}-4={[72-(66-12)]×3}-4=[(72-54)×3]-4=(18×3)-4= 54-4=50 ; 9) 14×{[(96:3×16)×(50-50)]×1000}=14×[(32×16)]×1000= 14×0×1000=0 ; 10) {[(455-5)+9]:10+2000-143}+(3+2)=([[(91+9):10+2000-143]+6=(100:10-2000-143)+6=(2010-143)+6=1867+6=1873 ; 11) {[12×5-(99:9-70:7)×5]:5-1}×74= {[60-(11-10)×5]:5-1}×74= [(60-1×5):5-1]×74= (55:5-1)×74=(11-1)×74= 10×74=740 ; 12) 30+{32:8+5×[8×(20:2-70:10)]}:2 = 30+{4+5×[8×(10-7)]}:2= 30+(4+5×24):2= 30+(4+120):2= 30+124:2= 30+62= 92

Loreen19: mai am putin
Loreen19: gata
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