Question

how to solve these questions ​

Answer 1

Answer:

BY HANDS OF COURSE

EXPLANATION:

a) 45+77=77+45

   =122=122

   = 1

SORRY CAN'T SOLVE THE OTHER PARTS

Answer 2

Step-by-step explanation:

(a) -5/11*-7/9=-7/9*-5/11

using commutative property

a*b=b*a

a=-5/11 b= -7/9

=35/99=35/99

(b)=(2/3+7/8)+(-1/2)=2/3+[7/8+(-1/2)]

(a+b)+c=a+(b+c)

by using associative property

a=2/3 b=7/8 c=(-1/2)

=(16+21/24)-1/2=2/3+(7-4/8)

=(37/24-1/2)=(2/3+3/8)

=(37-12/24)=(16+9/24)

=(25/24)=(25/24)

(c)-6/19+0=0+(-6/19)=-6/19

using a+e=e+a=a

here, e is additive identity which is 0