Question

Tính nhanh :

a) \(-7624+\left(1543+7624\right)\)

b) \(\left(25-514\right)-\left(486-73\right)\)

Answer 1

a,1543

b,-542

Answer 2

a) -7624+(1543+7624)

= -7624+1543+7624

=-7624+7624+1543

=0+1543

=1543

b) (25-514)-(486-73)

=25-514-486+73

=25+73-514-486

=100-1000

=-900

Answer 3

a) \(-7624+\left(1543+7624\right)\)

\(=\left(-7624+7624\right)+1543\)

\(=0+1543\)

\(=1543\)

b) \(\left(25-514\right)-\left(486-73\right)\)

\(=\left(25+73\right)-\left(514+486\right)\)

\(=98-1000\)

\(=-902\)

Answer 4

b,-902

mình nhầm

Answer 5

\(a\))\(-7624+\left(1543+7624\right)\)

\(=\left(-7624+7624\right)+1543\)

\(=0+1543\)

\(=1543\)