Question

= 14. Verifică egalitățile: a) 1 281 x 4 = 1 967 x 2 2 375 x 3 = 1 725 x 5 3 417 x 4 = 4 309 x 3 1 804 x 5 = 2 412 x 5 - b) 2035 x 7 = 2 849 x 5 1 452 x 3 = 5 874 x 7 3 755 4 = 6 341 x 5 1938 x 5 = 7 504 x 7 =​

Answer 1

Răspuns:

a)

1281x4=1967x2

5124=3934 (F)

2375x3=1725x5

7125=8625 (F)

3417x4=4309x3

13668=12927 (F)

1804x5=2412x5

9020=12060 (F)

b)

2035x7=2849x5

14245=14245 (A)

1452x3=5874x7

4356=41118 (F)

3755x4=6341x5

15020=31705 (F)

1938x5=7504x7

9690=52 528 (F)

Answer 2

Răspuns:

a)

$\bf 1~281\cdot4~=~1~967\cdot2$

$\bf 5~124~\neq ~3~934~~~\boxed{\bf\red{ ~F~}}$

                           

$\bf 2~375\cdot3=1~725\cdot5$  

$\bf7~125~\neq~ 8~625~~~\boxed{\bf\red{ ~F~}}$

                           

$\bf 3~417\cdot4~=~4~309\cdot3$

$\bf13~668~\neq~ 12~927~~~\boxed{\bf\red{ ~F~}}$

                           

$\bf 1~804\cdot5~=~2~412\cdot5$

$\bf 9~020~\neq~ 12~060~~~\boxed{\bf\red{ ~F~}}$

                             

b)

$\bf 2~035\cdot7~=~2~849\cdot5$

$\bf 14~245~=~14~245~~~\boxed{\bf\green{ ~A~}}$

                           

$\bf 1~452\cdot3~=~5~874\cdot7$

$\bf 4~356~\neq~ 41~118~~~\boxed{\bf\red{ ~F~}}$

                           

$\bf 3~755\cdot4~=~6~341\cdot5$

$\bf 15~020~\neq ~31~705~~~\boxed{\bf\red{ ~F~}}$

                           

$\bf 1~938\cdot5~=~7~504\cdot7$

$\bf 9~690~\neq ~52 ~528~~~\boxed{\bf\red{ ~F~}}$