Question

a)Calculeaza ca produs al unei sume cu un numar:
4x7+4x11+4x22
5x30+5x25+5x15

b)Calculeaza ca produs al unei diferente cu un numar:
9x50-9x35-9x12
7x45-7x32-7x7

Answer 1

4x7+4x11+4x22=4(7+11+22)=4x40=160

5x30+5x25+5x15=5(30+25+15)=5x70=350

9x50-9x35-9x12=9(50-35-12)=9x3=27

7x45-7x32-7x7 =7(45-32-7)=7x6=42

Answer 2

4x7+4x11+4x22= 4x (7+11+22)=4x40=160
5x30+5x25+5x15=5x(30+25+15)=5x70=350

b)9x50-9x35-9x12=9x(50-35-12)=9x3=27
7x45-7x32-7x7=7x(45-32-7)=7x6=42