Question

а) 458 + 333 + 42 + 67; 
б) 635 + 308 + 1365 + 392; 
в) 411 + 419 + 145 + 725 + 87; 
г) 11 + 12 + 13 + 14 + 15 + 16 + 17 + 18 + 19.

Answer 1

458+333+42+67=900
635+308+1365+392=2700
411+419+145+725+87=1787
11+12+13+14+15+16+17+18+19=135