\(\frac{5^{56}+5^7}{5^{49}+1}=\frac{5^7\left(5^{49}+1\right)}{5^{49}+1}=5^7\)

\(\frac{5^{56}+5^7}{5^{49}+1}=\frac{5^5+5^7}{1}=5^5+5^7=3125+78125=81250\)

lớp 4 nha mình ấn lộn

a b,a b,a b là sao ?

1) \(\left(3x-1\right)\left(2x+7\right)-\left(12x^3+8x^2-14x\right):2x\)

\(=6x^2+19x-7-6x^2-4x+7=15x\)

2) \(\left(63^3-37^3\right):26+63.37\)

\(=\left(63-37\right)\left(63^2+63.37+37^2\right):26+63.37\)

\(\left[26\left(63^2+63.37+37^2\right)\right]:26+63.37\)

\(63^2+2.63.37+37^2=\left(63+37\right)^2=100^2=10000\)

Ta có: \(16\times48+8\times48+32\times14\)

\(=48\times\left(16+8\right)+32\times14\)

\(=48\times24+32\times14=16\times3\times4\times6+32\times2\times7\)

\(=64\times18+64\times7=64\times\left(18+7\right)=64\times25=1600\)

Ta có: 325+426-418-317

=(325-317)+(426-418)

=8+8

=16

Ta có: \(\frac{16\times48+8\times48+32\times14}{325+426-418-317}\)

\(=\frac{1600}{16}=100\)

841        

315/316*313/314*316/315*317/313

=315*313*316*317/316*314*315*313

=317/314

Tick cho mik nha

rồi triệt tiêu cho nhau

    (7²²+7²¹+7²⁰) : (2⁵+2⁴+3²)

=(7²⁰.7²+7²⁰.7+7²⁰) : (2⁴.2+2⁴+3²)

=[7²⁰.(7²⁺7+1)] : [2⁴.(2+1)+9]

=(7²⁰.57) : (16.3+9)

=(7²⁰.57) : (16.3+3.3)

=(7²⁰.57) : [3.(16+3)]

=(7²⁰.57) : (3.19)

=[7²⁰.(3.19)] : (3.19)

=7²⁰

cảm ơn đã chọn

70 + 30 : 3  =  70 : 10                   

                   =  7