1.Find the sum: (a) `3+(-4)`

Find the sum: 4/(15)+3/(20)

Draw hops on a number line to show the addition statement and find the sum : {:(a.,3 + (-7),b.,(-4) + 6),(c.,3 + 5,d.,(-2) + (-5)):}

Find the sum 3(1)/(5)+4(3)/(5)+7(2)/(5)

Find the sum: 4(3)/(5)+2(7)/(8)

Re- arrange suitably and find the sum: 5/3+(11)/2+\ (-9)/4+\ (-8)/3+\ (-7)/2

Find the sum:  (i) 5/8+3/(10) (ii) 4 3/4+9 2/5

Find the sum:  (i) 5/6+3+3/4 (ii) 2 3/5+4 7/(10)+2 4/(15)

Find the sum, sum_(k=1) ^(20) (1+2+3+.....+k)

Re- arrange suitably and find the sum: (-4)/7+7/6+2/7+\ 3+\ (-11)/6

If the mean of six consecutive multiples of 4 is 18 , find the sum of 3rd and 4th numbers.