f: \(-20:2^2+\left(-5\right)^9:5^8\)

\(=-20:4-5^9:5^8\)

=-5-5

=-10

g: \(-100:5^2+\left(-7\right)\cdot\left(-3\right)^2\)

\(=-\dfrac{100}{25}-7\cdot9\)

=-4-63

=-67

h: \(-84:4+3^9:\left(-3\right)^7+\left(-5\right)^0\)

\(=-21-3^9:3^7+1\)

\(=-21-3^2+1\)

=-20-9

=-29

i: \(-29-\left[16+3\left(51-49\right)\right]\)

\(=-29-16-3\cdot2\)

=-45-6

=-51

j: \(-58\cdot75+58\cdot\left(-50\right)-58\left(-25\right)\)

\(=58\cdot\left(-75\right)+58\left(-50\right)+58\cdot25\)

\(=58\left(-75-50+25\right)\)

\(=-58\cdot100=-5800\)

a)100:25+7.9=4+16=20

b)84:4+9+1=31

c)29-(16+3.1)=10

d)5.4+98:49=20+2=22

a: =4+7x9

=67

b: =21+9+1

=31

a)122

b)265

c)7

d)4

A = 75 +60-13=122.B = 250-25+40=265.C=29-[16+3.2] ➙29-22=7 D= 10-[16.5+88]:28➙ 10-168:28➙10-6=4

a) =148
b) =265
c) =7
d) =4

\(a,=75+60-13=122\\ b,=250-25+40=265\\ c,=4+100-9=95\\ d,=45+80-27=98\\ e,=5^3-100=125-100=25\\ g,=5+5=10\)

a)
=\(3.5.5+3.5.2-13=3.5\left(5+2\right)-13=15.7-13=105-13=92\)
b)
\(=5^3.2-25+2^3.5=5.25-5.5+8.5=5\left(25-5+8\right)=5.28=140\)
c)
\(6^2:9+50.2-3^3.3=36:9+100-3^4\)
=\(4+100-81\)=23

a: \(3\cdot5^2+15\cdot2^2-26:2\)

\(=75+60-13\)

=122

b: \(5^3\cdot2-100:4+2^3\cdot5\)

\(=250-25+40\)

=265

c: \(6^2:9+50\cdot2-3^3\cdot3\)

\(=4+100-9\)

=95

59 + 64 = 36 + 63 + 59 _Sai_

129 + 157 - 29 =129 - 29 + 157 _Đúng_

129 + 157 - 29 = 157 + 129 - 29 _Đúng_

4 +16 x 25 = 16 + 4 x 25 _Sai_

21 + 49 : 7 = 49 + 21 : 7 _Sai_

(36 + 45 ) : 9 = (45+36 ) : 9 _Đúng_

(Cái này tính nhẩm là ra thôi bạn ạ! Đúng cho mình 1 tick nhé bạn!)

sai

đúng

đúng

7

\(29-\left[16+3.\left(51-49\right)\right]\)

\(=29-\left[16+3.2\right]\)

\(=29-\left[16+6\right]\)

\(=29-22=7\)

\(29-\left[16+3\left(51-49\right)\right]=29-\left(16+6\right)=29-22=7\)

\(=26-16-3\cdot2\)

=10-6

=4

29-[16+3.( 51-49)]

=29-16-3.2

=7

:))     hok tốt

`@` `\text {Ans}`

`\downarrow`

`29 - [16 + 3.(51 - 49)]`

`= 29 - (16 + 3.2)`

`= 29 - (16 + 6)`

`= 29 - 22`

`= 7`

29 – [16 + 3.(51 – 49)]

= 29 - [16 + 3. 2]

= 29 - [16 + 6]

= 29 - 22

= 7

\(a)\) \(5^{13}:5^{10}-25.2^2=5^3-25.4=125-100=25\)

\(b)\) \(20:2^2+5^9:5^8=20:4+5^1=5+5=10\)

\(c)\) \(100:5^2+7.3^2=100:25+7.9=4+36=40\)

\(d)\) \(84:4+3^9:3^7+5^0=84:4+3^2+1=21+9+1=31\)

\(e)\)

\(29-\left[16+3.\left(51-49\right)\right]=29-\left[16+3.2\right]=29-\left[16+6\right]=29-22=7\)

\(f)\) \(5.2^2+98:7^2=5.4+98:49=20+2=22\)

\(g)\) \(3^{11}:3^9-147:7^2=3^2-147:49=9-3=6\)

\(295-\left(31-2^2.5\right)^2=295-\left(31-4.5\right)^2=295-\left(31-20\right)^2=295-11^2=295-121=174\)

\(7^{18}:7^{16}+2^2.3^2=7^2+4.9=49+36=85\)

a: \(5^{13}:5^{10}-25\cdot2^2\)

\(=5^3-25\cdot4\)

=125-100

=25

b: \(20:2^2+5^9:5^8\)

\(=20:4+5\)

=5+5

=10