Question

2. Calculează, respectand regulile invăţate.
a) (7x7 7:7) X7
(20:2+28) x2
(18x 2 + 18):6
b) 196 - 3x (89-45)
36 2x (12 + 47)
15 + 60: (39 - 29)
c) 1 000 - (35 + 60 X 2) + 40
999 + (10:2 x 4) - 501
50 + (40 + 80 X 100) - 50​

Answer 1

A) (7*7+7:7)*7=(49+1)*7=50*7=350

(20:2+28)*2=(10+28)*2=38*2=76

(18*2+18):6=(36+18):6=54:6=9

b) 196-3*(89-45)=196-3*44=196-132=64

36+2*(12+47)=36+2*59=36+188=154

15+60:(39-29)=15+60:10=15+6=21

c) 1000-(35+60*2)+40=1000-(35+120)+40=1000+ 85+40=1000+125=1125

999+(10:2*4)-501=999+(5*4)-501=999+20-501= 1019-501=518

50+(49+80*100)-50=50+(49+8000)-50=50+8049-50=8049