Question

Efectuati si faceti proba prin scadere a)835+65= 276+32= 187+27= 465+193= b)347+59= 289+72= 345+179= 287+297=​

Answer 1

Răspuns:

a)835+65=900

P=proba

P:900-65 sau 900-835

900-65=835

900-835=65

276+32=308

P:308-32=276 sau 308-276=32

187+27=214

P:214-27=187 sau 214-187=27

465+193=658

P:658-193=465 sau 658-465=193

b)347+59=406

P:406-59=347 sau 406-347=59

289+72=371

P:371-72=289 sau 371-289=72

345+179=526

P:526-179=345 sau 526-345=179

287+297=584

P:584-297=287 sau 584-287=297

Answer 2

Explicație pas cu pas:

a)835+65=900

proba:900-65=835

276+32=308

proba:308-32=276

187+27=214

proba:214-27=187

465+193=658

proba:658-193=465

b)347+59=406

proba:406-59=347

289+72=361

proba:361-72=289

345+179=524

proba:524-179=345

287+297=584

proba:584-297=287