Question

Ex. E in poza......

I) [7² + ( 2•5⁴ : 10 - 3⁴): 2²] :2²


Ptr cei care nu il vad bine pe I

Answer 1

a) (12•6+7•20)•10=(72+140)•10=212•10=2120

b) (23•8-16•3)•10=(184-48)•10=136•10=1360

c) (5 la puterea 0+5¹+5²+5³):2²=(1+5+25+125):4=(6+130):4=136:4=34

d) 5•[100-6•(60-15•3)]=5•[100-6•(60-45)]=5•(100-6•15)=

=5•(100-90)=5•10=50

e) 4•[10•(21•5-85)-93]=4•[10-(105-85)-93]=

=4•(10-20-93)=4•(-103)= - 412

f) [90+8•(16•3-32)]•17=

=[90+8•(48-32)]•17=

=(90+8•16)•17=

=(90+128)•17=

=218•17=

=3706

g) 10²:(35-15²:9)=100:(35-225/9)=100:(35-25)=100:10=10

h) [9²+9•(5²-3•2³+7)]:3²=

= [81+9•(25-3•8+7)]:9=

=[81+9•(25-24+7)]:9=

=[81+9•(1+7)]:9=

=(81+9•8):9=

=(81+72):9=

=153:9=

=17

i) [7²+(2•5⁴:10-3⁴):2²]:2²=

=[49+(2•625:10-81):4]:4=

=[49+(1250:10-81):4]:4=

=[49+(125-81):4]:4=

=(49+44:4):4=

=(49+11):4=

=60:4=

=15