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a: \(=36:4+2\cdot25=9+50=59\)
b: \(=79\left(82+18\right)=79\cdot100=7900\)
c: \(=49-9-\left(4^2+2^2\right)\)
\(=40-16-4=40-20=20\)
d: \(=16+\left[400:\left(200-42-138\right)\right]\)
\(=16+400:20=16+20=36\)
a) 22 + 3 . 23 = 22 + 3 . 8 = 22 + 24 = 46
b) 41 . 67 + 33 . 41 = 41 . ( 67 + 33 ) = 41 . 100 = 4100
c) 322 . 5 - [ 622 : 4 + 2 . ( 11 - 8) ] = 322 . 5 - [ 622 : 4 + 2 . 3 ] = 322 . 5 - [ 155,5 + 6 ] = 322 . 5 - 161,5 = 1610 + 161,5 = 1448,5
a) \(\left(\frac{-1}{6}+\frac{5}{-12}\right)+\frac{7}{12}=\left(\frac{-2}{12}+\frac{-5}{12}\right)+\frac{7}{12}=\left(\frac{-7}{12}\right)+\frac{7}{12}=0\)
b)\(\frac{7}{36}-\frac{8}{-9}+\frac{-2}{3}=\frac{7}{36}+\frac{32}{36}-\frac{24}{36}=\frac{15}{36}=\frac{5}{12}\)
c) \(\frac{3}{5}-\frac{2}{5}.\frac{10}{12}=\frac{3}{5}-\frac{2}{5}.\frac{5}{6}=\frac{3}{5}-\frac{1}{3}=\frac{9}{15}-\frac{5}{15}=\frac{4}{15}\)
d) \(\frac{2}{\left(-3\right)^2}+\frac{5}{-13}-\frac{-3}{4}=\frac{2}{9}-\frac{5}{13}+\frac{3}{4}=\frac{8}{36}-\frac{15}{36}+\frac{27}{36}=\frac{5}{9}\)
a) 54 : 52 + 32 . 33
= 52 + 35 = 25 + 243 = 268
Học tốt!!!
a) 54:52+32.33=52 + 35=25+243 = 278
b) 3+6+9+12+...+96
=3.1+3.2+3.3+3.4+...+3.32
=3.(1+2+3+4+...+32)
=3.\(\frac{\left(32+1\right).32}{2}\)=\(3.33.16=1584\)
a) \(\left(-0,75+\frac{1}{2}\right):\frac{4}{3}\)
\(=\frac{-1}{4}:\frac{4}{3}\)
\(=\frac{-3}{16}\)
b) \(\frac{5}{9}.\frac{2}{7}+\frac{5}{9}.\frac{5}{7}-\frac{8}{3}\)
\(=\frac{5}{9}.\left(\frac{2}{7}+\frac{5}{7}\right)-\frac{8}{3}\)
\(=\frac{5}{9}.1-\frac{8}{3}\)
\(=\frac{-19}{9}\)
c) \(7,5.1\frac{3}{4}-6\frac{2}{5}\)
\(=\frac{15}{2}.\frac{7}{4}-\frac{32}{5}\)
\(=\frac{269}{40}\)
1 a, Ta có: \(36^5\): \(18^5\)= \(\left(36:18\right)^5\)= \(2^5\)= \(32\)
\(1b.\)\(24\)\(5^3\)+ \(5^2\). \(5^3\)= \(5^2\). \(\left(5^3+24\right)\)= \(25.149\)= \(3725\)
a) 18 + 36 : 32
= 18 + 36 : 9
= 18 + 4
= 22
b) 23 . 81 + 23 . |-19|
= 2^3 . 81 + 2^3 . 19
= 2^3 ( 81 + 19 )
= 2^3 . 100
= 8 . 100
= 800
c) 2^3 . 5 - [ 6^2 : 4 + 3 ( 2^3 - 5 )]
= 8 . 5 - [ 36 : 4 + 3 ( 8 - 5 )]
= 40 - ( 36 : 4 + 3 . 3 )
= 40 - ( 9 + 9 )
= 40 - 18
= 22
a,18+36:32
=18+36:9
=18+4
=22