1 Reuse means using something again instead of throwing it away

2 Did your school organise a donation drive last winter?

1 My mother is fond of going jogging in the morning

2 My sister finds it difficult to lift weights

3 We collected plastic bottles and sent them to the factory

$a)\; -127+208-73+92$

$=(-127-73)+(208+92)$

$=-200+300$

$=100$

$b)\; 2353-(473+2153)+(-55+373)$

$=2353-473-2153-55+373$

$=(2353-2153)+(-473+373)-55$

$=200-100-55$

$=100-55$

$=45$

a) -127 + 208 - 73 + 92

-127+ (-73) - 208 + 92

= -(127+73) - 300

= -200 - 300

= (-200) + 300

= 100

b) 2353 - ( 473 + 2153) + (-55 + 373)

= 2353 - 473 - 2153 - 55 + 373

= (2353 - 2153) + (473 - 373) - 55

=  200 + 100 - 55

= 300 - 55

= 245