Упростите выражение и найдите его значение при х=-14,8; у=2,6. а)-1,9+ х+3,24+(-7,1)+у+(-5,24). при а=-2,8;в=-11,4. б) 4,28+(-6,
Татачка [6]
-1,9+x+3,24-7,1+y-5,24=x+y-11=-14,8+2,6-11=-23,2
4,28-6,8+a-2,28+b-5,2=-10+a+b=-10-2,8-11,4=-24,2
6×9=54
6=54\9
Ответ: 6=54\9
<span>7 3/4-(4 5/6- 3 1/2)+ 1 2/3 = 8 1/12
</span>1) 4 5/6 - 3 1/2 = 4 5/6 - 3 3/6 = 1 2/6 = 1 1/3
2) 7 3/4 - 1 1/3 = 7 9/12 - 1 4/12 = 6 5/12
3) 6 5/12 + 1 2/3 = 6 5/12 + 1 8/12 = 7 13/12 = 8 1/12
<span>9 2/5-(8 1/3 - 7 1/4 + 5 1/6) = 3,15
</span>1) 8 1/3 - 7 1/4 = 8 4/12 - 7 3/12 = 1 1/12
2) 1 1/12 + 5 1/6 = 1 1/12 + 5 2/12 = 6 3/12 = 6 1/4
3) 9 2/5 - 6 1/4 = 9 8/20 - 6 5/12 = 3 3/20 = 3,15
<span>(6 5/8- 1/2)- (5 3/4- 2 1/6) + (9 5/8 - 7 1/3) = 4 17/24
</span>1) 6 5/8 - 1/2 = 6 5/8 - 4/8 = 6 1/8
2) 5 3/4 - 2 1/6 = 5 9/12 - 2 2/12 = 3 7/12
3) 9 5/8 - 7 1/3 = 9 15/24 - 7 8/24 = 2 7/24
4) 6 1/8-3 7/12 = 6 3/24 - 3 17/24 = 5 27/24 - 3 17/24 = 2 10/24
5) 2 10/24 + 2 7 /24 = 4 17/24
<span><span>(5 1/30 - 2 3/5 - 2/15 + 6 ) - (7 - 6 11/12 + 1/4) = 7 29/30
</span>1) 5 1/30 - 2 3/5 = 5 1/30 - 2 18/30 = 4 31/30 - 2 18/30 = 2 13/30
2) 2 13/30 -2/15 = 2 13/30 - 4/30 = 2 9/30 = 2 3/10
3) 2 3/10 + 6 = 8 3/10
4) 7 - 6 11/12 = 6 12/12 - 6 11/12 = 1/12
5) 1/12+ 1/4 = 1/12 + 3/12 = 4/12 = 1/3
6) 8 3/10 - 1/3 = 8 9/30 - 10/30 = 7 39/30 - 10/30 = 7 29/30
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