-6/35 nhân -49/54 = mấy
-6/35.-49/54
\(\dfrac{-6}{35}\cdot\dfrac{-49}{54}=\dfrac{6}{35}\cdot\dfrac{49}{54}=\dfrac{1}{9}\cdot\dfrac{7}{5}=\dfrac{7}{45}\)
54+54=
49+49=
35+35=
62+62=
trả lời:
54+54=108
49+49=98
35+35=70
62+62=124
HOK TỐT
TK NHÉ
Easy !
54 + 54 = 108
49 + 49 = 98
35 + 35 = 70
62 + 62 = 124
#Anh#
Thực hiện phép tính: -1/8 + -5/3 -6/35× -49/54 6/5 - -4/3 31/17+ -5/13 +-8/13 -14/17
a: =-3/24-40/24
=-43/24
b: \(=\dfrac{6}{54}\cdot\dfrac{49}{35}=\dfrac{1}{9}\cdot\dfrac{7}{5}=\dfrac{7}{45}\)
c: \(=\dfrac{6}{5}+\dfrac{4}{3}=\dfrac{18+20}{15}=\dfrac{38}{15}\)
d: \(=\dfrac{31}{17}-\dfrac{14}{17}-\dfrac{5}{13}-\dfrac{8}{13}=1-1=0\)
35 nhân 34+35 nhân 95+65 nhân 75+65 nhân 54
35×34+35×95+65×75+65×54
=35×(34+95)+65×(75+54)
=35×129 + 65×129
=129×(35+65)
=129×100
=12 900
35×34+35×95+65×75+65×54
=35×(34+95)+65×(75+54)
=35×129+65×129
=129×(35+65)
=129×100
=12900
35 x 34 + 35 x 95 + 65 x 75 + 65 x 54
= 35 x ( 34 + 95 ) + 65 x ( 75 x 64 )
= 35 x 129 + 65 x 129
= 129 x ( 35 + 65 )
= 129 x 100
= 12900
#Học tốt#
54 nhân 50 + 49 nhân 100 / 37 nhân 38 + 128 nhân 19
=> 54 x 50 + 49 x 100 :37 x 38 + 128 x19 =1016443243
=1016443243
HỌC TỐT NHÉ
1,Tính nhanh
a, 568 + 568 x 135 - 568 x 36
b, 17 x 49 + 49 x 37 + 54 x 26 + 54 x 25
c, 14 x 35 x 5 + 10 x 25 x 7 + 20 x 70
a, 568 + 568 x 135 - 568 x 36
= 568 x ( 1 + 135 - 36)
= 568 x 100
56 800
b, 17 x 49 + 49 x 37 + 54 x 26 + 54 x 25
= 49 x ( 17 + 37) + 54 x ( 26 + 25 )
= 49 x 54 + 54 x 51
= 54 x ( 49 + 51)
= 54 x 100
= 5 400
c, 14 x 35 x 5 + 10 x 25 x 7 + 20 x 70
= ( 2 x 35) x ( 7 x 5) + ( 10 x 7) x 25 + 20 x 70
= 70 x 35 + 70 x 25 + 20 x 70
= 70 x ( 35 + 25 + 20)
= 70 x 80
= 5 600
a) 568 + 568 x 135 - 568 x 36
= 568 x ( 1+1+135-1-36 )
=568 x 100
=5680
b) 17 x 49 + 49 x 37 + 54 x 26 + 54 x 25
= 49 x ( 17 + 37 ) + 54 x ( 26 + 25 )
= 49 x 54 + 54 x 51
= 54 x ( 49 + 51 )
= 54 x 100
= 5400
c) 14 x 35 x 5 + 10 x 25 x 7 + 20 x 70
= 70 x 35 + 10 x 25 x 7+ 20 x 70
= 70 x 35 + 250 x 7 + 20 x 70
= 70 x 35 + 70 x 25 + 20 x 70
= 70 x (35+25+20)
= 70 x 80
= 5600
a, 35-{12-[-14+(-2)]}
b,49-(-54)-23
a) 35-{12-[-14-2]}=35-{12+14+2}=35-28=7
b)49+54-23=49+31=80
35 - {12-[(-14) + (-2)]}
= 35 - 12 + (-14) + (-2)
= 35 - (-14) + 12 - (-2)
= 35 - (-14) + 14
= 35 - 0
= 35
x-(-12)=(-8)+(-11)
1. Thực hiện phép tính ( tính nhanh )
a, -6/35 : -54/49
b,-5/7.2/11+5/7.9/11+1 1/5
c,( 1/3 + 3/4 - 13/12 ) : ( 12/13 +123/234 +1234/2345 )
Rút gọn rồi tính:
b, 12/28 15/35 42/49 =
c, 16/36 30/54 24/56 =
d, 12/36 20/48 25/60 =
b: \(=\dfrac{3}{7}\cdot\dfrac{5}{7}\cdot\dfrac{6}{7}=\dfrac{90}{343}\)
c: \(=\dfrac{4}{9}\cdot\dfrac{5}{9}\cdot\dfrac{3}{7}=\dfrac{20}{189}\)
d: \(=\dfrac{1}{3}\cdot\dfrac{5}{12}\cdot\dfrac{5}{12}=\dfrac{25}{432}\)