36+25+61+91+52+36
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a: \(61\cdot45+61\cdot23-68\cdot51\)
\(=61\left(45+23\right)-68\cdot51\)
\(=68\cdot61-68\cdot51\)
\(=68\left(61-51\right)=68\cdot10=680\)
b: \(3\cdot5^2-\left(75-4\cdot2^3\right)\)
\(=75-75+4\cdot8\)
\(=4\cdot8=32\)
c: \(36:\left\{2^2\cdot5-\left[30-\left(5-1\right)^2\right]\right\}\)
\(=\dfrac{36}{20-30+4^2}\)
\(=\dfrac{36}{-10+16}=\dfrac{36}{6}=6\)
d: \(\left(12\cdot49-3\cdot2^2\cdot7^2\right):\left(2020\cdot2021\right)\)
\(=\dfrac{\left(12\cdot49-12\cdot49\right)}{2020\cdot2021}=0\)
=(25+15)+(36+34)+(27+23)+(28+52)+(19+31)
=40+70+50+80+50
=(50+50)+(80+40)+70
=100+120+70
=220+70
=290
25+36+27+28+19+15+34+23+52+31
=(25+15)+(36+34)+(27+23)+(28+52)+(19+31)
=40+60+50+80+50
=(40+60)+(50+50)+80
=100+100+80
=280
\(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{36}\\{27}\end{array}}\\\hline{\,\,\,\,63}\end{array}\) \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{18}\\{52}\end{array}}\\\hline{\,\,\,70}\end{array}\) \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{83}\\{\,\,9}\end{array}}\\\hline{\,\,\,\,92}\end{array}\)
\(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{74}\\{19}\end{array}}\\\hline{\,\,\,\,93}\end{array}\) \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{55}\\{25}\end{array}}\\\hline{\,\,\,80}\end{array}\) \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{\,\,\,9}\\{61}\end{array}}\\\hline{\,\,\,\,70}\end{array}\)
SỐ ĐÓ LÀ
301
AI K NÍCH CÔ NÀNG
DỄ THƯƠNG THÌ MÌNH
K CHO 3 CÁI NHƯNG
BN PHẢI K NICK ĐÓ 2 CÁI
36 + 25 + 61 + 91 + 52 + 36
= 36 x 2 + ( 25 + 61 + 91 +52 )
= 72 + 229
= 301