Question

1 Tính nhanh ( 1 tick )  \(\frac{5,7x16,2+16,2x3,7-6,2x4,8-6,2x4,6}{13,4+12,3+11,2-10,4-11,5-12,6-0,4}\)

2 Tìm x ( 1 TICK ) 

520 +7,5 x 4 = \(\frac{X+175}{5}\)+ 30

 

Answer 1

520 +7,5 x 4 = \(\frac{X+175}{5}\)+ 30

<=>520+30=\(\frac{x+175}{5}\)+30

 <=>\(\frac{X+175}{5}\)+30 = 550

<=> \(\frac{X+175}{5}\)= 520

<=> X+175 = 2600

<=> X=2425

mik chưa lm đc bài 1

k mik nha

Answer 2

Câu 2

520 + 7,5 . 4 =   \(\frac{x+175}{5}\)+ 30 

520 + 30 =  \(\frac{x+175}{5}\)+ 30 

 \(\frac{x+175}{5}\)= 520

x + 175 = 2600

x  = 2425 

Vậy x = 2425 

Answer 3

Trả lời :

Bài 1 :

\(\frac{5,7.16,2+16,2.3,7-6,2.4,8-6,2.4,6}{13,4+12,3+11,2-10,4-11,5-12,6-0,4}\)

\(=\frac{16,2.\left(5,7+3,7\right)-6,2.\left(4,8-4,6\right)}{2}\)

\(=\frac{16,2.9,4-6,2.0,2}{2}\)

\(=\frac{151,04}{2}\)

\(=75,52\)

Bài 2 :

\(520+75.4=\frac{x+175}{5}+30\)

\(520+30=\frac{x+175}{5}+30\)

\(\frac{x+175}{5}+30=550\)

\(\frac{x+175}{5}=520\)

\(\Rightarrow x+175=2600\)

\(\Rightarrow x=2425\)

Hok_Tốt

#Thiên_Hy

Answer 4

1

A = 5,7×16,2+16,2×3,7−6,2×4,8−6,2×4,613,4+12,3+11,2−10,4−11,5−12,6−0,413,4+12,3+11,2−10,4−11,5−12,6−0,45,7×16,2+16,2×3,7−6,2×4,8−6,2×4,6​

A = 16,2×(5,7+3,7)−6,2×(4,8+4,6)(13,4−0,4+(12,3+11,2−11,5)−(10,4+12,6))(13,4−0,4+(12,3+11,2−11,5)−(10,4+12,6))16,2×(5,7+3,7)−6,2×(4,8+4,6)​

A = 16,2×9,4−6,2×9,413+12−2313+12−2316,2×9,4−6,2×9,4​

A = 9,4×(16,2−6,2)25−2325−239,4×(16,2−6,2)​

A = 9,4×10229,4×10​

A = 942294​

A = 47