Calculate with an explanation. Check calculations. 123+450 987-234 678-45,922 ++ 376 689-231 345-201 697-85 897-560 645+234 323+826 432+523 4622+205 to put or subtract sizes, it is convenient to transfer them to uniform small units of measure, and then to execute calculations.

338
123+450=573 987-234=753 678-45=633 922+376=1298 689-231=458 345-201=104 697-85=612 897-560=337 645+234=879 323+826=1149 432+523=955 4622+205=4827! conveniently in mind!
383
Answer add