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a ) 2 15 b ) − 2 5 c ) 1 d ) 1 e ) − 5 3 f ) 0 g ) 2 3 5 h ) 1
=(1+...2005)x(125x1001x127-127x1001x125)
=(1+...2005)x0
=0
Chúc bạn học giỏi
TL:
b) (-5).(-23) + 21 : (-7) + 20220
= (-5) . (-8) + 21 : (-7) + 1
= 40 + -3 + 1
= 38
HT
b) (-5).(-23) + 21 : (-7) + 20220 = (-5) . (-8) + 21 : (-7) + 1 = 40 + -3 + 1 = 38
dễ vậy cũng hỏh
À câu này giải theo cách này e nhé!
E tham khảo nha:(-- được xem là +)
=>(2020+27)+(2020-73)-129
=2047+1947-129=3865
a ) 11,3 + 6,9 + 8,7,+ 13,1
= ( 11,3 + 8,7) + (6,9 + 13,1)
= 20 + 20
= 40
b) ( 1 + 3 + 5 + ...+ 2007 + 2009 + 2011 ) ( 125125 x127 - 127127 x 125)
= ( 1 + 3 + 5 + ... + 2007 + 2009 + 2011 ) ( 15890875 - 15890875 )
= ( 1 + 3 + 5 + ... + 2007 + 2009 + 2011 ) x 0
= 0
''a ) 11,3 + 6,9 + 8,7,+ 13,1 = ( 11,3 + 8,7) + (6,9 + 13,1) = 20 + 20 = 40 b) ( 1 + 3 + 5 + ...+ 2007 + 2009 + 2011 ) ( 125125 x127 - 127127 x 125) = ( 1 + 3 + 5 + ... + 2007 + 2009 + 2011 ) ( 15890875 - 15890875 ) = ( 1 + 3 + 5 + ... + 2007 + 2009 + 2011 ) x 0 = 0''
a) (-25). ( 35-147) + 35. (25-147)
= -875 + 3675 + 875 - 5145
= ( -875 + 875 ) + 3675 - 5145
= 0 + ( - 1470 )
= - 1475
2x - 4 = 156
2x = 156 + 4
2x = 160
x = 160 : 2
x = 80
mk chỉ biết làm câu 2 nhưng ko biết có đúng ko nữa nếu đúng thì ủng hộ nha
a) \(35.26+35.74\)
\(=35\left(26+74\right)\)
\(=35.100\)
\(=3500\)
b) \(6^7:6^5+3.3^2\)
\(=6^2+3^3\)
\(=36+27\)
\(=63\)
a. 99 - (-55) : 5 + \(2022^0\)
= 99 - (-11) + 1
= 110 +1
=111
b. = \(\left[\left(-35\right)+\left(-65\right)\right]+\left(127+73\right)\)
= -100 + 200
= 100
Thầy, lớp 6 sao toán khó vậy? đã vậy có 1 điểm à.
a) 99−(74−129):5+2022099−(74−129):5+20220
=99−(55):5+1=99−(55):5+1
=99−(−11)+1=99−(−11)+1
=110+1=111=110+1=111.
b) (−35)+127+(−65)+73(−35)+127+(−65)+73
=(127+73)−(35+65)=(127+73)−(35+65)
=200−100=100=200−100=100.
a) 99−(74−129):5+2022099−(74−129):5+20220
=99−(55):5+1=99−(55):5+1
=99−(−11)+1=99−(−11)+1
=110+1=111=110+1=111.
b) (−35)+127+(−65)+73(−35)+127+(−65)+73
=(127+73)−(35+65)=(127+73)−(35+65)
=200−100=100=200−100=100.
a) 99−(74−129):5+2022099−(74−129):5+20220
=99−(55):5+1=99−(55):5+1
=99−(−11)+1=99−(−11)+1
=110+1=111=110+1=111.
b) (−35)+127+(−65)+73(−35)+127+(−65)+73
=(127+73)−(35+65)=(127+73)−(35+65)
=200−100=100=200−100=100.
a) 99−(74−129):5+2022099−(74−129):5+20220
=99−(55):5+1=99−(55):5+1
=99−(−11)+1=99−(−11)+1
=110+1=111=110+1=111.
b) (−35)+127+(−65)+73(−35)+127+(−65)+73
=(127+73)−(35+65)=(127+73)−(35+65)
=200−100=100=200−100=100.
a) 99−(74−129):5+2022099−(74−129):5+20220
=99−(55):5+1=99−(55):5+1
=99−(−11)+1=99−(−11)+1
=110+1=111=110+1=111.
b) (−35)+127+(−65)+73(−35)+127+(−65)+73
=(127+73)−(35+65)=(127+73)−(35+65)
=200−100=100=200−100=100.
a. 99 - (-55) : 5 + 2022020220
= 99 - (-11) + 1
= 110 +1
=111
b. = [(−35)+(−65)]+(127+73)[(−35)+(−65)]+(127+73)
= -100 + 200
= 100
a) 99−(74−129):5+2022099−(74−129):5+20220.
b) (−35)+127+(−65)+73(−35)+127+(−65)+73.
Hướng dẫn giải:a) 99−(74−129):5+2022099−(74−129):5+20220
=99−(55):5+1=99−(55):5+1
=99−(−11)+1=99−(−11)+1
=110+1=111=110+1=111.
b) (−35)+127+(−65)+73(−35)+127+(−65)+73
=(127+73)−(35+65)=(127+73)−(35+65)
=200−100=100=200−100=100.
a) 99 −(74−129):5+2022099− (74−129):5+2022^00. b) (−35)+127+(−65)+73(−35)+127+(−65)+73
= [(-35)+(-65) + (127+73)
= (-100) + 200
= 100
= 99-(-55):5+1ơ
=99-11+1
=88+1
= 89
a) 99−(74−129):5+2022099−(74−129):5+20220
=99−(55):5+1=99−(55):5+1
=99−(−11)+1=99−(−11)+1
=110+1=111=110+1=111.
b) (−35)+127+(−65)+73(−35)+127+(−65)+73
=(127+73)−(35+65)=(127+73)−(35+65)
=200−100=100=200−100=100.
a) =99−(55):5+1
=99−(−11)+1=99−(−11)+1
=110+1=111=110+1
=111.
b) (−35)+127+(−65)+73(−35)+127+(−65)+73
=(127+73)−(35+65)=(127+73)−(35+65)
=200−100=100=200−100
=100.
a. 99 - (-55) : 5 + 2022020220
= 99 - (-11) + 1
= 110 +1
=111
b. = [(−35)+(−65)]+(127+73)[(−35)+(−65)]+(127+73)
= -100 + 200
= 100
a)99-(74-129):5+2022^0
=99-(74-129):5+1
=99-(- 55):5+1
=99-(-11)+1
=110+1
=111
b)(-35)+127+(-65)+73
=[(-35)+(-65)]+(127+73)
=-100+200
=200-100
=100
A) =(-55)÷5=-11
=99–(-11)+1=111
B) =(–35+–65)+(127+73)
=‐100+200=100
a) 99 - (74 - 129) : 5 + 2022^0
=99- (-55) ÷5+20221
=111
b)(-35) + 127 + (-65) + 73
= [(-35) + (-65)] + (127 + 73)
= (-100) + 200
= 100