a) 12 x 10 : 4 + (190 - 30) : 8 + (202 : 2 + 33 x 3 ) : 10 =
= 12 x 10 : 4 + 160 : 8 + (101 + 99) : 10 =
= 12 x 10 : 4 + 160 : 8 + 200 : 10 =
= 30 + 20 + 20 =
= 70
b) (9 x 7 + 7 x 8) x 4 - (404 : 4 + 44 : 4) :2 =
= (63 + 56) x 4 - (101 + 11) : 2 =
= 119 x 4 - 112 : 2 =
= 476 - 56 =
= 420
c) 1000 - (250 : 2 + 25 x 3) x 3 - (25 + 15 x 5) x 4 =
= 1000 - (125 + 75) x 3 - (25 + 75) x 4 =
= 100 - 200 x 3 - 100 x 4 =
= 1000 - 600 - 400 =
= 0
d) 23 x ( 157 - 24 x 6 ) - 477 : 3 - ( 22 + 220 :2) =
= 23 x (157 - 144) - 477 : 3 - (22 + 110) =
= 23 x 13 - 477 : 3 - 32 =
=299 - 159 - 32 =
= 108
e) 135 + 5000 : (1385 - 385) + 3 x (40 + 8 : 2) =
= 135 + 5000 : 1000 + 3 x (40 + 4) =
= 135 + 5000 : 1000 + 3 x 44 =
= 135 + 5 + 132 =
= 272
f)36 + 0 : (125 x 25 - 25 x 25) + 33 x 3 - 33 : 33 + 33 : 3 =
= 36 + 0 : (5 - 1) + 33 x 3 - 33 : 33 + 33 : 3 =
= 36 + 0 : 4 + 33 x 3 - 33 : 33 + 33 : 3 =
= 36 + 0 + 99 - 1 + 11 =
= 145
g) 909 - 909 x (102 - 909 : 9 + 0 : 1) - 99 x (9 9 : 9 - 9) =
= 909 - 909 x ( 102 - 101 + 0) - 99 x (9 - 9) =
= 909 - 909 x 1 - 99 x 0 =
= 909 - 909 - 0 =
= 0
h) 3 x ( 6 - 6 : 2) + 305 : 5 + (100 : 5 + 8 x 5 x 0) :5 =
= 3 x ( 6 - 3) + 305 : 5 + ( 20 + 0) : 5 =
= 3 x 3 + 305 : 5 + 20 : 5 =
= 9 + 61 + 4 =
= 74
i) 138 + (27 : 3 -1) x 2 : 8 - 2 x (100 - 195 : 15 ) x 2 =
= 138 + ( 9 - 1) x 2 : 8 - 2 x ( 100 - 13) x 2 =
= 138 + 8 x 2 : 8 - 2 x 87 x 2 =
= 138 + 2 - 348
= (undeva este o greșeală, pt că nu putem să efectuăm scăderea unui nr. mare dintr-un nr. mai mic)
Î) 7 + 7 : 7 x (7 - 7 : 7) x 7 : 7 =
= 7 + 7 : 7 x (7 - 1) x 7 : 7 =
= 7 + 7 : 7 x 6 x 7 : 7 =
= 7 + 1 x 6 x 7 : 7 =
= 7 + 6 x 7 : 7 =
= 7 + 42 : 7 =
= 7 + 6 =
= 13
j) ( 202 : 2 + 101 x 2 ) : 3 - 2 x ( 2 - 2 : 2) =
= (101 + 202) : 3 - 2 x ( 2 - 1) =
= 303 : 3 - 2 x 1 =
= 101 - 2 =
= 99
K) 36 + 8 x ( 100 - 47 - 53 + 2 x 18 ) : ( 13 - 36 : 9) =
= 36 + 8 x ( 100 - 47 - 53 + 36 ) : ( 13 - 4) =
= 36 + 8 x 36 : 9 =
= 36 + 288 : 9 =
= 36 + 32 =
68
l) 1000 : (74 + 26 ) + 100 x (8 + 2) - ( 2 x 286 + 2 x 214) =
= 1000 : 100 + 100 x 10 - ( 572 + 428) =
= 1000 : 100 + 100 x 10 - 1000 =
=10 + 1000 - 1000 =
= 1010 - 1000 =
= 10
m) 425 : ( 600 - 595) - (81 : 9 + 71 x 1) + (4 x 11 - 66 : 2) =
= 425 : 5 - (9 + 71 ) + (44 - 33) =
= 425 : 5 - 80 + 11 =
= 85 - 80 + 11 =
= 16
n) 35 + 1000 : ( 15 x 25 - 25 x 25) + 3 x (40 + 8 : 2) =
= 35 + 1000 : ( 375 - 625) + 3 x (40 + 4) =
= 35 + 1000 : ? + 3 x 44 =
(nu pot continua calculele pt. că ne dă eroare la prima paranteză, adică 375 - 625 nu se poate calcula)
o) 550 : 10 + 20 x (81 : 9 + 9) - 20 : (6 x 7 - 11 x 2) =
= 550 : 10 + 20 x ( 9 + 9) - 20 : (42 - 22) =
= 550 : 10 + 20 x 18 - 20 : 20 =
= 55 + 360 - 1 =
= 414
p) 82 + 9 x (5 x 5 - 5) : (5 + 5 x 5 - 4 x 5) : (9 - 81 : 9 + 90 : 10) =
= 82 + 9 x (25 - 5) : (5 + 25 - 20) : (9 - 9 + 9) =
= 82 + 9 x 20 : 10 : 9 =
= 82 + 180 : 10 : 9 =
= 82 + 18 : 9 =
= 82 + 2 =
= 84
q) 15 - 3 x 6 : ( 3 x 3 x 3 : 3 + 0 : 5) + 30 : ( 3 : 3 + 5) =
= 15 - 3 x 6 : ( 9 + 0) + 30 : ( 1 + 5) =
= 15 - 3 x 6 : 9 + 30 : 6 =
= 15 - 2 + 5 =
= 18
