Question

Tính

a)  237 . ( -26) + 26 . 137

b)  136 . ( - 47 ) + 36 . 47

c ) -48 . 72 + 36  . ( -304)

giúp mk !!!

Answer 1

a,=\(237.\left(-26\right)+26.137\)

=\(-6162\)\(+3572\)

=\(-2590\)

b,=\(-136+47+36.47\)

=\(47.\left(-136-36\right)\)

=\(47.-100\)

=\(-4700\)

Answer 2

a) 237 . (-26) + 26 . 137

= -237 . 26 + 26 . 137

= 26 . (-237 + 137)

= 26 . -100

= -2600

b) 136 . (-47) + 36 . 47

= -136 . 47 + 36 . 47

= 47 . (-136 + 36)

= 47 . -100

= -4700

c) -48 . 72 + 36 . (-304)

= -48 . 72 + 36 . 2 . (-152)

= -48 . 72 + 72 . (-152)

= 72 . (-48 + -152)

= 72 . -200

= -14400