gia tri cua bieu thuc 5\3-3\4 la a 21\12 b 12\12 c 11\12 d 7\12
QV
Những câu hỏi liên quan
inh gia tri cua bieu thuc
B=1+2-3-4+5+6-7-7+9+10-11-12+...-299-330+301+302
gia tri cua bieu thuc 7(4^6-9^5+6^9.120)/-8^4.3^12-6^11
tim gia tri cua bieu thuc
A=1-2-3-4+5-6-7-8+9-10-11-12+...........+97+98-99-100
TIM GIA TRI LON NHAT CUA BIEU THUC :
C=2+12/3x/X+5/+4
TIM GIA TRI NHO NHAT CUA BIEU THUC
C= -15/ 4x / 3X+7/+3
tinh gia tri cua bieu thuc \
A= (100+98+96+....................+2)-97-95-......-1
B=1+2-3-4+5+6-7-8+9+10-11-12+............-299-300+301+302
tinh gia tri bieu thuc:
A) 1000000 - 107492 : 154 x 28 + 1000
B) 8/15 + 4/7 + 14/30 + 12/21 + 5
C) 9/13 : 6/11 - 5/12 : 6/11
Tim x :
1) X x2 + X x 1/5 = 8/5
2) X : 3/8 = 4/3 : 3/6
A) 1000000 - 107492 : 154 x 28 + 1000
= 1000000 - 19544 + 1000
= 981456
B) 8/15 + 4/7 + 14/30 + 12/21 + 5
= 15/7 + 5
= 50/7
C) 9/13 : 6/11 - 5/12 : 6/11
= 9/13 x 11/6 - 5/12 x 11/6
= (9/13 - 5/12) x 11/6
= 43/156 x 11/6
= 473/936
Bài 2
1) X x2 + X x 1/5 = 8/5
X x (2 + 1/5 ) = 8/5
X x 11/5 = 8/5
X = 8/5 x 5/11
X = 8/11
2) X : 3/8 = 4/3 : 3/6
X : 3/8 = 8/3
X = 8/3 x 3/8
X = 1
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a) 1 000 000 - 107 492 : 154 x 28 + 1000
= 1 000 000 - 698 x 28 + 1000
= 1 000 000 - 19544 + 1000
= 980 456 + 1000
= 981 456
b) 8/15 + 4/7 + 14/30 + 12/21 + 5
= ( 8/15 + 14/30 ) + ( 4/7 + 12/21 ) + 5
= ( 16/30 + 14/30 ) + ( 12/21 + 12/21 ) + 5
= 30/30 + 24/21 + 5
= 1 + 24/21 + 5
= ( 1 + 5 ) + 24/21
= 6 + 24/21
= 150/21
= 50/7
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bai 1: Tinh gia tri cua bieu thuc:
a) 12 : { 390 : [ 500 - ( 125 + 35 . 7 ) ] }
b) 12000 - ( 1500 . 2 + 1800 . 3 + 12 . 2 : 3 )
a) 12 : { 390 : [ 500 - ( 125 + 35. 7 ) ] }
= 12 : { 390 : [ 500 - ( 125 + 245 ) ] }
= 12 : { 390 : [ 500 - 370 ] }
= 12 : { 390 : 130 }
= 12 : 3
= 4
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b) 12000 - ( 1500 .2 + 1800 .3 + 12 . 2 : 3 )
= 12000 - ( 3000 + 5400 + 8 )
= 12000 - 8408
= 3592
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a) 12 : { 390 : [ 500 - ( 125 + 35 . 7 ) ] }
= 12 : {390 : [500 - (125 + 245)]}
= 12 : [390 : (500 - 370)]
= 12 : (390 : 130)
= 12 : 3 = 4.
b/ 12000 - ( 1500 . 2 + 1800 . 3 + 12 . 2 : 3 )
= 12000 - (3000 + 5400 + 24 : 3)
= 12000 - (8400 + 24 : 3)
= 12000 - (8400 + 8)
= 12000 - 8408
= 3592.
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gia tri bieu thuc A=312+513+715+112010 khi chia cho 5 co so du la
gia tri cua bieu thuc A bang 312+513+715+112010 khi chia cho 5 thi du may ?