Question

3. Completați tabelul: b a+b a-b 5-a-b (a+b)(a-b) 237 1 257 4 307 128 123 307 154 3 249 2 374 46 751 374




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Answer 1

Răspuns:

a+b=237+128=365

a-b=237-128=109

5×a-b=5×237-128=1185-128=1057

(a+b)(a-b)=365×109=39785

a+b=1257+123=1380

a-b=1257-123=1134

5×a-b=5×1257-123=6285-123=6162

(a+b)(a-b)=1380×1134=1564920

a+b=154+46=200

a-b=154-46=108

5×a-b=5×154-46=770-46=724

(a+b)(a-b)=200×108=21600

a+b=3249+751=4000

a-b=3249-751=2498

5×a-b=5×3249-751=16245-751=15494

(a+b)(a-b)=4000×2498=9992000

a+b=2374+374=2748

a-b=2274-374=2000

5×a-b=5×2374-374=11870-374=11496

(a+b)(a-b)=2748×2000=5496000

a+b=128+22=130

a-b=128-22=106

5×a-b=5×128-22=640-22=618

(a+b)(a-b)=130×106=13780