Question

9. Calculează:
a) (420 : 2 + 160 : 8) - 160 : 5;
(660 : 6 + 66 : 6) - (7 x 3 +2);
800 : 8 + (560 - 640 : 2);
(752 +248 + 80): 9 + 440 : 4;
811 - 11 x 11:11 + 48 : 2 x 10;
(12 + 12 x 8 + 12 : 4) * (120 - 23 x 5);
b) 524 - (12 x 9 + 135) - 14 x 2;
856 - (13 x 5) - (61 x 5 + 25 x 10);
(21 x 5 +45) - (124 x 2 - 101 x 2);
32 : 8 + 15 x 8 - 145 x 2 + (1230 - 10:2).
(7 * 7+ 102 x 3 - 250) : (144 - 100 - 13 x 3
(50 : 5 + 205 - 420 : 2) × (1234 : 2-538:2)

Answer 1

(420:2+160:8)-160:5=
(210+20)-32=
230-32=198

(660:6+66:6)-(7x3+2)=
(110+11)-(21+2)=
121-23=98

800:8+(560-640:2)=
100+(560-320)=
100+240=340

(752+248+80):9+440:4=
1080:9+110=
120+110=230

811-11x11:11+48:2x10=
811-121:11+24x10=
811-11+240=
800+240=1040

(12+12x8+12:4)x(120-23x5)=
(12+96+3)x(120-115)=
111x5=555

B)
524-(12x9+135)-14x2=
524-(108+135)-28=
524-243-28=
281-28=253

856-(13x5)-(61x5+25x10)=
856-65-(305+250)=
791-555=236

(21x5+45)-(124x2-101x2)=
(105+45)-(248-202)=
150-46=104

32:8+15x8-145x2+(1230-10:2)=
4+120-290+(1230-5)=
124-290+1225=
-166+1225=1059. Sper ca ai scris corect exercițiul asta

(7x7+102x3-250):(144-100-13x3)=
49+306-205):(44-39)=
(355-205):5=
150:5=30

(50:5+205-420:2)x(1234:2-538:2)=
(10+205-210)x(617-269)=
(215-210)x348=
5x348=1740


Succes!