Question

1) simplify using asssociative property .

43+21+79

2) using distributive property find the value of.

1673×99-(-1673)

$3)state \: whether \: the \: anwer \: of \frac{2}{5} + \frac{1}{2} \: is \: greater \: or \: less \: than \: one$

Answer 1

1:
43+(21+79)
43+100
143
2:
1673×99-(-1673)
1673×(99+1)
1673×100
167300
3:
2/5+1/2
2/5×2+1/2×5
4/10+5/10
9/10
(1=10/10)
hence, 2/5+1/2 is smaller than 1.