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pomozova2015
@pomozova2015
December 2021
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Вычислите , выбирая удобный способ а)6,4-(4,4-2,8) б)25-(2,31+2,69) в)8,3-2,3+5 г)23,6-13,6-9 д)17- (4,4+2,6) е)7,28-(3,28+9) ж)85-2,1-2,1-2,9 з)2-0.8-0,92
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ФАИНА1984
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а)6,4-(4,4-2,8)=(6.4-4.4)+2.8=2+2.8=4.8 б)25-(2,31+2,69)=25-5=20 в)8,3-2,3+5=(8.3-2.3)+5=6+5=11 г)23,6-13,6-9=(23.6-13.6)-9=10-9=1 д)17- (4,4+2,6)=17-7=10 е)7,28-(3,28+9) =(7.28-3.28)-9=4-9=-5 ж)85-2,1-2,1-2,9=(85-2.1)-(2.1+2.9)=82.9-5=77.9 з)2-0.8-0,92=2-(0.8+0.92)=2-1.72=0.28
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а)6,4-(4,4-2,8)=(6.4-4.4)+2.8=2+2.8=4.8 б)25-(2,31+2,69)=25-5=20 в)8,3-2,3+5=(8.3-2.3)+5=6+5=11 г)23,6-13,6-9=(23.6-13.6)-9=10-9=1 д)17- (4,4+2,6)=17-7=10 е)7,28-(3,28+9) =(7.28-3.28)-9=4-9=-5 ж)85-2,1-2,1-2,9=(85-2.1)-(2.1+2.9)=82.9-5=77.9 з)2-0.8-0,92=2-(0.8+0.92)=2-1.72=0.28