Question

Câu 10: Tính nhanh

a. 543 X 125 – 543 X 24 – 543

b. x X 35 + x X 64 + x = 25

tính giúp mk ạ

cảm ơn

Answer 1

a) 543 x 125 - 543 x 24 - 543

= 543 x 125 - 543 x 24 - 543 x 1 

= 543 x (125 + 24 + 1) 

= 543 x 150 

= 81450 

b) X x 35 + X x 64 + X= 25

X x 35 + X x 64 + X x 1= 25 

X x (35 + 64 + 1) = 25

X x 100= 25

X         = 25 :100 

X          = 0,25 (25/100) 

Answer 2

a)

\(543.125-543.24-543\)

\(=543.125-543.24-543.1\)

\(=543.(125-24-1)\)

\(=543.100=54300\)

b)

\(x .35+x.64+x=25\)

\(x.(35+64+1)=25\)

\(x.100 =25\)

\(x = 25:100\)

\(x = {1\over4}\)

_HT_

Answer 3

\(a)543\times125-543\times24-543\)

\(=543\times125-543\times24-543\times1\)

\(=543\times\left(125-24-1\right)\)

\(=543\times100\)

\(=54300\)

\(b)x\times35+x\times64+x=25\)

\(x\times35+x\times64+x\times1=25\)

\(x\times\left(35+64+1\right)=25\)

\(x\times100=25\)

               \(x=25\div100\)

               \(x=0,25\)

Answer 4

cảm ơn mọi người nha