ajutor!! dau coroanaaa​

Răspuns:

a) 10•[108- 5•(72-60)

10•(108-5•12)

10•(108-60)

10•48

480

b) [27•5+4•(14•7-34)]

[44+4•(98-34)]

44+4•64

44+256

300

c) [220+9•(87-57)]•10

220+9•30•10

220+270•10

220+2700

2920

d) 10•[65•6-(35•4-40)]

10•390-(140-40)

3900-100

3800

Răspuns:

a) 10x[36x3-5x(72-12x5)]= 10x[36x3-5x(72-60)=10x(36x3-5x12)=10x(108-60)=10x48=480

b) [27x5+4x(14x7-34)]=[27x5+4x(98-34)]= (27x5+4x65)=135+256=391

c) [44x5+9x(87-19x3)]x10= [44x5+9x(87-57)]x10=

(44x5+9x30)x10= (220+270)x10= 490x10=4900

d) 10x[65x6-(35x4-40)]= 10x[65x6-(140-40)]=10x(65x6-100)=10x(390-100)=10x290=2900