Question

1. 12x3^0+2x{2^2x3+2x[154-5^2x(2x2^2-16:8)]}
2. Comparati numerele 36^56 si 216^37
3.Scoateti factor comun 2998x127-126x2998-2998
4. Aflati numarul care impartit la 95 da catul 14 si restul 10
5.Stiind ca b-c=87 si a=19 calculati a x b-a x c
6.INtro curte sunt gaini iepuri si in total 1/3 de capete si 62 picioare.Cate gaini si cati iepuri sunt?
7.Opt caiete si trei stilouri costa 69 lei iar 2 caiete si patru stilouri costa 66lei
Aflati cati lei costa un stilou si cati un caiet?
Ofer 100 puncte si coroana !!!!!!!! (Macar cateva sa faceti)
Urgent

Answer 1

1. 12•1+2•{4•3+2•[154-25•(2•4-2)]}=12+2•{12+2•[154-25•(8-2)]}=12+2•{12+2•[154-25•6]}=12+2•{12+2•[154-150]}=12+2•{12+2•4}=12+2•{12+8}=12+2•20=12+40=52

2.36^56=(2^2)^56•(3^2)^56=2^102•3^102

216^37=(2^3)^37•(3^3)^37=2^111•3^111

(2^102•3^102)<(2^111•3^111)

3. 2998(127-126-1)=2998•0=0

4.×= nr.necunoscut

×:95=14 r10

×=95•14+10= 1330+10=1340

5.a•b-a•c=a(b-c)=19•87=1653

6.iepurii au 4 picioare

gainile au 2 picioare

×=nr de gaini

y= nr de iepuri

x+y=13

y=13-×

4y+2×=62

4(13-×)+2×=62

52-4×+2×=62

-2×=10

×=-5

y=18

ceva e aici gresit...

7.c=caiete

s= stilouri

8c+3s=69

2c+4s=66=>2(c+2s)=66=>c+2s=33=>c=33-2s

8(33-2s)+3s=69

264-16s+3s=69

-13s=69-264=-195

s=15

c=33-2s=33-2•15=33-30=3