Thực hiện phép tính :
a) 5 . 10^4 – 4 . 10^3 + 6 . 10^2 – 5 . 10.
b) 361 – 1456 : 112 + 2^3 . 5^2 – 6^2.
Mn giúp mk nha!!!
Thực hiện phép tính :
a) 5 . 10^4 – 4 . 10^3 + 6 . 10^2 – 5 . 10.
b) 361 – 1456 : 112 + 2^3 . 5^2 – 6^2.
Mn giúp mk nha!!!
a) 5 . 10^4 – 4 . 10^3 + 6 . 10^2 – 5 . 10.
=5.10.10.10.10-4.10.10.10+6.10.10-5.10
=10.5000-10.400+10.60-10.5
=10.(5000-400+60-5)
=10.4655
=46550
b) 361 – 1456 : 112 + 2^3 . 5^2 – 6^2.
=361 – 1456 : 112 +8.25-36
=361-13+200-36
=348+200-36
=548-36
=512
`a) 5 . 10^4 – 4 . 10^3 + 6 . 10^2 – 5 . 10`
`=10^3 ×(5.10-4) + 10×(6.10-5)`
`=1000×46+10×55`
`=46000+550`
`=46550`
`361 – 1456 : 112 + 2^3 . 5^2 – 6^2`
`=361-13 +2^2×(2.5^2-3^2)`
`=348+4×41`
`=348+164`
`=512`