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a) 4,5 x 5,5 + 4,7 x 4,5
=4,5 x (5,5 +4,7)
=4,5 x 10,2
= 45,9
b) 7,5 x 2,5 x 0,04
=7,5 x (2,5 x 0,04)
=7,5 x 0,1
=0,75
c) 73,5 x 35, 64 ÷ 73,5 x 64,36
=73,5 x(35,64+64,36)
= 73,5 x 100
= 7350
d) 3,12 x 8 x 1,25
=3,12 x (8 x 1,25)
=3,12 x 10
= 31,2
e)6,48 x 11, 25 - 6,48 x 1,25
=6,48 x (11,25 -1,25)
= 6,48x 10
=64,8
f)3,67 x 58,35 + 58,35 x 6,33
=58,35 x (3,67+6,33)
= 58,35x 10
=583,5
You're welcome :))
A) \(4,5\times5,5+4,7\times4,5\)
\(=4,5\times\left(5,5+4,7\right)\)
\(=4,5\times10,2\)
\(=45,9\)
B) \(7,5\times2,5\times0,04\)
\(=7,5\times\left(2,5\times0,04\right)\)
\(=7,5\times0,1\)
\(=0,75\)
C) \(73,5\times35,64+73,5\times64,36\)
\(=73,5\times\left(35,64+64,36\right)\)
\(=73,5\times100\)
\(=7350\)
D) \(3,12\times8\times1,25\)
\(=3,12\times\left(8\times1,25\right)\)
\(=3,12\times10\)
\(=31,2\)
E) \(6,48\times11,25-6,48\times1,25\)
\(=6,48\times\left(11,25-1,25\right)\)
\(=6,48\times10\)
\(=64,8\)
F) \(3,67\times58,35+58,35\times6,33\)
\(=\left(3,67+6,33\right)\times58,35\)
\(=10\times58,35\)
\(=583,5\)
* Lần sau bạn tách câu hỏi ra để dễ giải hơn nhé *
Hc tốt
@Duongg
a. y x 47 = 24064
y = 24064 : 47
y = 512
b. Y x 2 7 = 3 4 x 4 15 Y x 2 7 = 1 5 Y = 1 5 : 2 7 Y = 1 5 x 7 2 Y = 7 10
a) x + 527 = 1892
x = 1892 - 527
x = 1365
b) x – 631 = 361
x = 361 + 631
x = 992
c) x × 5 = 1085
x = 1085 : 5
x = 217
d) x : 5 = 187
x = 187 × 5
x = 935
a, \(x+527=1892\)
\(< =>x=1892-527=1365\)
b, \(x-631=361\)
\(< =>x=361+631=992\)
c, \(x.5=1085\)
\(< =>x=\frac{1085}{5}=217\)
d, \(x:5=187\)
\(< =>x=187.5=935\)
a, 45 x 46 + 45 x 45 - 30 - 15= 45x( 46+45) -30 -15= 45 x 91 - 30 - 15= 4095 - 30 - 15= 4050
b, 891 x 29 + 29 x 8+ 29= 29 x ( 891 + 8+ 1)= 29 x 900= 26100
c, 73 x ( 84+17) + 27 x (74+27)= 73 x 101 + 27 x 101= 101 x ( 73+27)= 101 x 100= 10100
d, chịu
d, đề bài= 13 x ( 99 + 2) + 13 x 1001+ 11 x 1300= 13 x 101 + 13 x 1001+ 13 x 1100= 13 x ( 101 + 1001 + 1100) = 13 x 2202= 28626
a) \(y\times27+y\times30+y\times43=210500\)
\(y\times\left(27+30+43\right)=210500\)
\(y\times100=210500\)
\(y=210500\div100\)
\(y=2105\)
b) \(15\times y+85\times y=300\)
\(y\times\left(15+85\right)=300\)
\(y\times100=300\)
\(y=300\div100\)
\(y=3\)
\(a,y\times27+y\times30+y\times43=210500\)
\(\Rightarrow y\times\left(27+30+43\right)=210500\)
\(\Rightarrow y\times100=210500\)
\(\Rightarrow y=210500:100=2105\)
\(b,15\times y+85\times y=300\)
\(\Rightarrow y\times\left(15+85\right)=300\)
\(\Rightarrow y\times100=300\)
\(\Rightarrow y=300:100=3\)
a)136-x=400/8+7
136-x=50+7
136-x=57
x=136-57
x=79
b)x+x+x+15=21
3x=21-15
3x=6
x=6/3
x=2
c)35+x+27=80
62+x=80
x=80-62
x=18
a)136-x=400:8+7
136-x=57
x=136-57
x=79
b)x+x+x+15=21
x*3+15=21
x*3=21-15
x=6:3
x=2
c)35+x+27=80
35+x=80-27
x=53-35
x=18
a)x-1,56=7,88
x=7,88+1,56
x=9,44
b)x+1,25=3,16-0,78
x+1,25=2,38
x=2,38-1,25
x=1,13
c)x-4,56=27-15,6
x-4,56=11,4
x=11,4+4,56
x=15,96
d)x+0,99=5,62
x=5,62-0,99
x=4,63