Thuc hien phep tinh bang cach hop li ( neu co the )
a / 81 + 243 + 19
b / ( 67 + 129 ) + ( 133 - 29 )
c / 75 × 16 + 84 × 75 - 500
d / 4 × 52 - 16 : 23 20200
Những câu hỏi liên quan
thuc hien phep tinh bang cach hop ly(neu co the) a)248:{[(368+232):120-3]+122}+2011 b) -243+(319:314+28:25)
a) 248: {[( 368+232): 120-3]+122}+2011
=248:{[600:120-3]+122}+2011
=> 248:{ 2+122}+2011
=> 248: 124+2011
=> 2+2011
=> 2013
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thuc hien phep tinh bang cach hop li neu co the 37x96-86x37+2x23x5-30+4x16x25
thuc hien phep tinh bang cach hop li neu co the 30-[50-(9-4)2]+20150
30-[50-(9-4)2]+20150
=30-[50-52]+20150
=30-[50-25]+20150
=30-25+20150
=30-25+1
=5+1
=6
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Thuc hien phep tinh sau bang cach hop li nhat:
a)5/11+1/2+2/5+6/11+3/4+16/25+5/16
b)19/4+37/100+1/8+132/25+5/2+37/12
5/11+1/2+2/5+6/11+3/4+16/25+5/16
=1441/400
19/4+37/100+1/8+132/25+5/2+37/12
=1933/120
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Ban lam sao duooc nhu the giai ra cho minh voi
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1/4 - 1/3+ 5/12 Thuc hien cac phep tinh (tinh hop li neu co the)
\(\dfrac{1}{4}-\dfrac{1}{3}+\dfrac{5}{12}\\ =\dfrac{3}{12}-\dfrac{4}{12}+\dfrac{5}{12}\\ =\dfrac{3-4+5}{12}\\ =\dfrac{4}{12}\\ =\dfrac{1}{3}\)
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thuc hien phep tinh sau 1 cach hop li
9764/36615+36.85.20/25.84.34+22/10+3 19/133(la hon so)
b, 4/6+4/30+4/70+..+4/2.99.101
thuc hien cac phep tinh bang cach hop li : 4x51x7+2x86x7 +12x2x7
4x51x7+2x86x7+12x2x7=
(4 x7)x51+(2x7)x86+(2x7)x12=
28x51+14x86+14x12=
14x2x51+14x86+14 x12=
14x102+14x86+14x12=
14x(102+86+12)=
14x200=
2800
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4x51x7+2x86x7+12x2x7
(4 x7)x51+(2x7)x86+(2x7)x12
28x51+14x86+14x12
14x2x51+14x86+14 x12
14x102+14x86+14x12
14x(102+86+12)
14x200
2800
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=4x51x7+2x86x7+12x2x7
=(4 x7)x51+(2x7)x86+(2x7)x12
=28x51+14x86+14x12
=14x2x51+14x86+14 x12
=14x102+14x86+14x12
=14x(102+86+12)
=14x200
2800
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Xem thêm câu trả lời
thuc hien phep tinh ( hop li neu co the ) :
a, (-167) - |-24| + 67
b, (-1988 - 432) - (-32 - 1988)
c, 5. (-7) - (-4)2 - | -1010 |
d, 61 - 93 . 61 + (-61) . 8
a, (-167) - |-24| + 67
=(-167+67)-|-24|
=-100 - 24
=-124
b, (-1988 - 432) - (-32 - 1988)
= -1988+432-32+1988
= (-1988+1988) + (432-32)
= 0+400
=400
a, ( - 167 ) - |- 24 | + 67
= [ ( - 167 ) + 67 ] - 24
= - 100 - 24
= - 124
b, ( - 1988 - 432 ) - ( - 32 - 1988 )
= - 1988 - 432 - 32 + 1988
= ( - 1988 + 1988 ) - ( 432 - 32 )
= 0 - 400 = - 400
Xem thêm câu trả lời
Thuc hien phep tinh ( tinh nhanh neu co the )
a) 27 . ( 58 - 43 ) + 43 . ( 27 + 58 )
b) 66 . ( 34 - 75 ) - 34 . ( 66 + 75 )
Minh can gap !!!!!!
a , 27 . ( 58 - 43 ) + 43 . ( 27 + 58 ) b . 66 . ( 34 - 75 ) - 34 . ( 66 + 75 )
= 27 . 10 + 43 . 85 = 66 . ( 34 - 75 ) + ( -34 ) . ( 66 + 75 )
= 270 + 3755 = [ 66 . 75 + 66 + 75 ] . 34 . ( - 34 )
= 4025 0
k và kb nếu có thể