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$\textbf{a)}$
$\{[126-(36-31)^2\cdot2]-9\}\cdot1001$
$=\{126-5^2\cdot2-9\}\cdot1001$
$=(126-50-9)\cdot1001$
$=67\cdot1001$
$=67067.$
$\textbf{b)}$
$\{315-[(60-41)^2-361]\cdot4217\}+2885$
$=\{315-(19^2-361)\cdot4217\}+2885$
$=\{315-(361-361)\cdot4217\}+2885$
$=315+2885$
$=3200.$
$\textbf{Bài 1a}$
$\{[216-(36-31)^3\cdot2]-9\}\cdot1001$
$=\{216-5^3\cdot2-9\}\cdot1001$
$=(216-250-9)\cdot1001$
$=(-43)\cdot1001$
$=-43043.$
$\textbf{Bài 1b}$
$\{315-[(60-41)^2-361]\cdot4217\}+2885$
$=\{315-(19^2-361)\cdot4217\}+2885$
$=\{315-(361-361)\cdot4217\}+2885$
$=315+2885$
$=3200.$
$\textbf{a)}$
$\{[261-(36-3)\cdot3^2]-9\}\cdot1001$
$=\{261-33\cdot9-9\}\cdot1001$
$=(261-297-9)\cdot1001$
$=-45\cdot1001$
$=-45045.$
$\textbf{b)}$
$\{315-[(660-41)^2-361]\cdot4217\}+2885$
$=\{315-(619^2-19^2)\cdot4217\}+2885$
$=\{315-(619-19)(619+19)\cdot4217\}+2885$
$=\{315-600\cdot638\cdot4217\}+2885$
$=3200-1613691600$
$=-1613688400.$
a, {[216 -(36-31).25.2]-9}.1001
=[(216-5.25.2)-9].1001
=[(216-100)-9].1001
=(116-9).1001
=107.1001
=107107
b, {315-[(60-41).19-361].4217}+2885
= [315-(19.19-361).4217]+2885
=[315-(361-361).4217]+2885
=(315-0.4217)+2885
=315+2885
=3200
****cho mình nhé
a, {[216 -(36-31).25.2]-9}.1001
=[(216-5.25.2)-9].1001
=[(216-100)-9].1001
=(116-9).1001
=107.1001
=107107
b, {315-[(60-41).19-361].4217}+2885
= [315-(19.19-361).4217]+2885
=[315-(361-361).4217]+2885
=(315-0.4217)+2885
=315+2885
=3200
@tính bằng cách hợp lý a) 2^3-2^x3+2^3x88 b) 53x39+47x39-53x21-47x21 c) 1+2+3+.....+101+102 d) 5+8+11+14+.....+38+41 h) 51-49+55-53+59-57+63-61+65 k) 4^2x102-4^3x17-4^2x34 m) {[261-(36-31)^3x2]-9}x1001 n) [( 46-32)^2-(54-42)^2] x39-1872 i) [(58+72
$\textbf{A}$
$A=[261-(36-31)^3\cdot2]-9\cdot1001$
$=[261-5^3\cdot2]-9009$
$=[261-125\cdot2]-9009$
$=(261-250)-9009$
$=11-9009$
$=-8998.$
$\textbf{B}$
$B=\{315-[(60-41)^2-361]\cdot4217\}+2885$
$=\{315-(19^2-361)\cdot4217\}+2885$
$=\{315-(361-361)\cdot4217\}+2885$
$=315-0+2885$
$=3200.$
$\textbf{C}$
$C=[(46-32)^2-(54-42)^2]\cdot36-1872$
$=[14^2-12^2]\cdot36-1872$
$=(14-12)(14+12)\cdot36-1872$
$=2\cdot26\cdot36-1872$
$=52\cdot36-1872$
$=1872-1872$
$=0.$