Question

1.Calculează:
(8x9-4:2)-(91-9x9) =
100-(27+ 7x6-48:8):7=
(4x8+ 3x9 +21):10: (40-9x4)=
56 (100-8x5-6x57x3 -1) =
(24+ 6x2):4 +7-(28- 12:3):6=
(54: 6x36x2): 3 =
(2x3x3):2x(45:9 +72:8-16:2)=
4x3+15-7x2+37-8x6=
19+(6x7-18)-2x9=
73-58+29 - 4 =
24:8 x 3 x 4:6=
30+32:8 + 8 x 7-100: 10 =
20-(3 x 5-2+3): (26-9x2)=
10 x 4:5 x 3+32-32:8x7=
89 +64:8 x 7-28:7x4=
(25:5-7:7)+(36:9+8 x0) =
815-24:2:2=
50:10:5+90:9=
12+6:(3+9:3)=
21-21: 7x(4-5:5)=

Dau coroană!
promit ❤️​

Answer 1

a) (8x9-4:2)-(91-9x9)= (72-2)-(91-81)= 70-10= 60
b) 100-(27+7x6-48:8):7= 100-(27+42-6):7= 100-63:7= 100-9= 81
c) (4x8+3x9+21):10:(40-9x4)= (32+27+21):10:(40-36)= 80:10:4= 8:4= 2
d) 56(100-8x5-6x57x3-1)= 56(100-40-1026-1)= 56(-1087)= -60 872
e) (24+6x2):4+7-(28-12:3):6= (24+12):4+7-(28-4):6= 36:4+7-24:6= 9+7-4= 12
f) (54:6x36x2):3= 9x36x2:3= 9x12x2= 216
g) (2x3x3):2x(45:9+72:8-16:2)= 9x(5+9-8)= 9x6= 54
h) 4x3+15-7x2+37-8x6= 12+15-14+37-48= 2
i) 19+(6x7-18)-2x9= 19+(42-18)-18= 19+24-18= 25
j) 73-58+29-4= 15+29-4= 40
k) 24:8x3x4:6= 3x3x4:6 = 36:6= 6
l) 30+32:8+8x7-100:10= 30+4+56-10= 80
m) 20-(3x5-2+3):(26-9x2)= 20-(15+1):(26-18)= 20-16:8= 20-2= 18
n) 10x4:5x3+32-32:8x7= 2x4x3+32-4x7= 24+32-28= 28
o) 89+64:8x7-28:7x4= 89-8x7-4x4= 89-56-16= 17
p) (25:5-7:7)+(36:9+8x0)= (5-1)+(4+0)= 4+4= 8
q) 815-24:2:2= 815-12:2= 815-6= 809
r) 50:10:5+90:9= 5:5+10= 1+10= 11
s) 12+6:(3+9:3)= 12+6:(3+3)= 12+6:6=
12+1= 13
t) 21-21:7x(4-5:5)= 21-3x(4-1)= 21-3x3= 21-9= 12

Succes!