Question

Find (-49)*18;(-25)*(-31);70*(-19)+(-1)*70 using distributive property

Answer 1

(-49)*18
-49 (10+8)
-49*10 + -49*8
-490 + -392
(-882)

(-25)*(-31)
-25(30+1)
-25*30 + -25*1
-750  + -25
(-775)

70*(-19)+(-1)*70
70(-20)
(-1400)

Answer 2

Answer:

☆(-49)×18=-49×(10+8)

=(-49×10)+(-49×8)

=(-490)+(-392)

=-882

☆(-25)×(-31)

=-25×(30+1)

=(-25×30)+(-25×1)

=(-750)+(-25)

=-775

☆70×(-19)+(-1)×70

=70×((-19)+(-1))

=70×(-20)

=-1400