Răspuns :

Jojoi54id

Răspuns:

a)

5x(3+2)=5x5=25

5x(3+2)=5x3+5x2=15+10=25

4x(7-2)=4x5=20

4x(7-2)=4x7-4x2=28-8=20

3x(2+6)=3x8=24

3x(2+6)=3x2+3x6=6+18=24

(7-5)X4=2x4=8

(7-5)X4=7x4-5x4=28-20=8

b)

7x(5+1)=7x6=42

7x(5+1)=7x5+7x1=35+7=42

8x(5-4)=8x1=8

8x(5-4)=8x5-8x4=40-32=8

6x(3+6)=6x9=54

6x(3+6)=6x3+6x6=18+36=54

(9-6)X2=3x2=6

(9-6)X2=9x2-6x2=18-12=6

2)

6x(5+3)=6x5+6x3

6x8=30+18

48=48. (A)

(9-5)X4=9x4-5x4

4x4=36-20

16=16 (A)

6x(4+3)=6+4x6+3

6x7=6+24+3

42=33 (F)

7x(9-4)=7+(9x4)

7x5=7+36

30=43 (F)

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