Question

1, tính 

a, -13 - (-15)

b, 43-(56-43)+(56-12)

c,4\(^4\): 2\(^8\)+ \([\)13 - ( -5 ) \(]\). (-3)

d, 135 . ( 13 - 37 ) + 37 . ( 135 - 13)

Answer 1

\(a,-13-\left(-15\right)=-13+15=2\)

\(b,43-\left(56-43\right)+\left(56-12\right)=43-13+44=30+44=74\)

\(c,4^4:2^8+\left[13-\left(-5\right)\right]\cdot\left(-3\right)=256:256+\left(13+5\right)\cdot\left(-3\right)\)\(=1+18\cdot\left(-3\right)=1+\left(-54\right)=-53\)

\(d,135\cdot\left(13-37\right)+37\cdot\left(135-13\right)=135\cdot\left(-24\right)+37\cdot122\)\(=-3240+4514=1274\)

Answer 2

a, -13-(-15)=-13+15=2

b, 43-(56-43)+(56-12)=43-13+44=30+44=74

c, 4^4:2^8+[13-(-5)].(-3)=256:256+(13+5).(-3)=1+18.(-3)=1+(-54)=-53

d, 135.(13-37)+37.(135-13)=135.(-24)+37.122=-3240+4514=1274

Answer 3

a)-13-(-15)=-13+15=2

b)43-(56-43)+(56-12)=43-56+43+56-12=43+(56-56)-12=43+0-12=43-12=31

c)=256:256+13+5.(-3)=1+18.(-3)=19.(-3)=-57

d)135.(13-37)+37.(135-13)=135.13-135.37+(37.135-37.13)=(135.13-37.135)+(135.37-37.13)=135.37-13+37.

Answer 4

BÀI 1: TÍNH

A) \(-13-\left(-15\right)=-13+15=2\)

B) \(43-\left(56-43\right)+\left(56-12\right)\)

\(=43-56+43+56-12\)

\(=43+43+56-56-12\)

\(=86+0-12\)

\(=74\)

C) \(4^4\div2^8+[13-\left(-5\right)]\times\left(-3\right)\)

\(=\left(2^2\right)^4\div2^8+18\times\left(-3\right)\)

=\(2^8:2^8+\left(-54\right)\)

\(=1+\left(-54\right)\)

=-53

D)\(135\times\left(13-37\right)+37\times\left(135-13\right)\)

\(=135\times13-135\times37+37\times135-37\times13\)

\(=135\times13-37\times13+(37\times135-135\times37)\)

\(=13\left(135-37\right)+0\)

\(=13\times98=1274\)

CHÚC BN HỌC TỐT!!!!