matematika 5_klass_otvetov

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matematika 5 klass zadanie № 1 variant № 1 1. naydite znachenie virajeniya: (72 : 200 0,42 ): 0,53 (49:200-0,16):0,125 (0,245-0,16):0,125 (0,085):0.125= 0,68 2. reshite uravnenie: (x-375):18=2064:48 (x-375):18=43 x-375=774 x=774+375 x=1149 3. na olimpiade po matematike 32% uchastnikov poluchili gramoti. skolko uchashixsya uchastvovalo na olimpiade po matematike, esli gramoti poluchili 416 uchashixsya? 32% - 416 chel. 100% - x chel x= 100*416:32=1300 otvet: 1300 uchashixsya uchastvovalo na olimpiade po matematike 4. virazite v tonnax: 450 kg, 28 ts 5 kg, 3 t 4 ts 25 kg. okruglite otveti do desyatix i vichislite srednee arifmeticheskoe etix znacheniy. 450kg-4,5t, 28ts5kg-0,285t, 3t4ts25kg-3,425t okruglenie 4,5t, 0,2t, 3,4t srednee arifmeticheskoe (4,5t+0,2t+3,4t)/3=2,7t 5. naydite massu mednogo kuba, summa vsex ryober kotorogo ravna 72 sm. massa 1 sm3 mednogo kuba ravna 8,9 gr. naydem obem, obem kuba storona v kube. v=a u kuba 12 reber togda 1 rebro ravno a=72/12=6 63 =136. mkuba= 136*8.9=1210.4gramma ili 1.2104kg otvet: …

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,001) m = (0,47 + 0,006) m = 0,476 m, posle okrugleniya do sotix 0,476 m ≈ 0,48 m. 3) 25 6 mm = 25·0,001 m = 0,025 m, posle okrugleniya do sotix 0,025 m ≈ 0,03 m. 4) srednee arifmeticheskoe chisel opredelyaetsya kak chastnoe summi zadannix chisel na kolichestvo chisel. poetomu (8,07 + 0,48 + 0,03) : 3 = 8,58 : 3 = 2,86. 5. iz tryox odinakovix derevyannix bruskov obrazovali parallelepiped. bruski v forme parallelepipeda i imeyut izmereniya a = 30sm, b = 20sm, c = 10sm. nayti ob'yom obrazovannogo parallelepipeda. 1) 30*20=600 2) 600•10=6000 otvet: v=6000

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matematika 5 klass zadanie № 1 variant № 1 1. naydite znachenie virajeniya: (72 : 200 0,42 ): 0,53 (49:200-0,16):0,125 (0,245-0,16):0,125 (0,085):0.125= 0,68 2. reshite uravnenie: (x-375):18=2064:48 (x-375):18=43 x-375=774 x=774+375 x=1149 3. na olimpiade po matematike 32% uchastnikov poluchili gramoti. skolko uchashixsya uchastvovalo na olimpiade po matematike, esli gramoti poluchili 416 uchashixsya? 32% - 416 chel. 100% - x chel x= 100*416:32=1300 otvet: 1300 uchashixsya uchastvovalo na olimpiade po matematike 4. virazite v tonnax: 450 kg, 28 ts 5 kg, 3 t 4 ts 25 kg. okruglite otveti do desyatix i vichislite srednee arifmeticheskoe etix znacheniy. 450kg-4,5t, 28ts5kg-0,285t, 3t4ts25kg-3,425t okruglenie 4,5t, 0,2t, 3,4t srednee arifmeticheskoe (4,5t+0,2t+3,4t)/3=2,7t 5. naydite massu medn...

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