Question

calculează în două moduri 5×(4+3) 6×(5+4) 5×6+5×3 3×6+6×7 ​

Answer 1

Răspuns:

5x(4+3)=5x7=35

5x(4+3)=5x4+5x3= 20+15=35

6x(5+4)=6x9=54

6x(5+4)=6x4+6x5=24+30=54

5x7+5x3=35+15=50

3x6+6x7=18+42= 60

Answer 2

Răspuns:

a)5×(4+3)=7×5=35

5×(4+3)=5×4+5×3=20+15=35

b)6×(5+4)=9×6=54

6×(5+4)=6×5+6×4=30+24=54

c)5×6+5×3=30+15=45

5×(6+3)=9×5=45

d)3×6+6×7=18+42=60

6×(3+7)=10×6=60