Question

DAU COROANAA repede va rog
ordinea efectuării operatiilor
45-8-7
45-(8+7)
240*10-10*2
7laa2-5laa2
(7-5)totlaa2
7laa2+5laa2-2*7*5
3*10laa2
(3-10)totlaa2
54-2*(28-9:3)
2
efectuați respectând ordine a efectuării operatiilor si prioritățile operatiilor
10+(13*13:13)+320+999000*0=

4+5 *{28:7+0*[35+8*(400:5-84:7)]}

2015+2016*2015-2017*2014=

Answer 1

45 - 8 - 7 = 37 - 7 = 30

45 - ( 8 + 7 ) = 45 - 15 = 30

240 × 10 - 10 × 2 = 2 400 - 20 = 2 380

7² - 5² = 49 - 25 = 24

( 7 - 5 )² = 2² = 4

7² + 5² - 2 × 7 × 5 = 49 + 25 - 70 = 74 - 70 = 4

3 × 10² = 3 × 100 = 300

( 3 - 10 ) ² = ( - 7 )² = 49

54 - 2 × ( 28 - 9 : 3 ) = 54 - 2 × ( 28 - 3 ) = 54 - 2 × 25 = 54 - 50 = 4

2)

10 + ( 13 × 13 : 13 ) + 320 + 999 000 × 0 = 343

= 10 + 13 + 320 + 0 =

= 343

_______________

4 + 5 × { 28 : 7 + 0 × [ 35 + 8 × ( 400 : 5 - 84 : 7 ) ] } = 24

= 4 + 5 × { 4 + 0 × [ 35 + 8 × ( 80 - 12 ) ] } =

= 4 + 5 × [ 4 + 0 × ( 35 + 8 × 68 ) =

= 4 + 5 × ( 4 + 0 ) =

= 4 + 5 × 4 =

= 4 + 20 =

= 24

__________

2015 + 2016 × 2015 - 2017 × 2014 = 2017

= 2015 × ( 1 + 2016 ) - 2017 × 2014 =

= 2015 × 2017 - 2017 × 2014 =

= 2017 × ( 2015 - 2014 ) =

= 2017 × 1 =

= 2017