Question

(iii) 65129 x 99 -(-65129)
Name the additive inverse of:
(i) 15
(ii) -23
Verify and also name the property used.
(i) (-445) + 315 = 315 + (445)
iii) [64 + (-40)] + 16 = 64 + [(-40) + 16]
(v) 18 [100 + (-5)] = 18 × 100+ 18 * (-5)​

Answer 1

Name the additive inverse of:

1) 15

1) -15

2) -23

  2) 23

         

Verify and also name the property used.

1) (-445) + 315 = 315 + (445)

1)commutative property is used

(-445) + 315 = -130

315 + (-445) = -130

[64 + (-40)] + 16 = 64 + [(-40) + 16]

2)associative property.

(64-40)+16=64+(-40+16)

24+16=64-24

40=40

LHS+RHS

3) 65129 x 99 -(-65129)

3)65129×99+65129

6447771+65129

6512940

4) 18*[100+(-5)]=18*100+18*(-5)

18*95=1800+(-90)

1710=1710

LHS=RHS

Distributive Property of Multiplication over Addition