Question

Calculează:
a) (18+ 2 x 7): (12:2+8:4)
b) 24 - 24: 3 x (72:9- 2 x 3): 4 x 5
c) 36: 6 + 4x2x5-(20 - 12:3)
d) 42:7 + (6 + 6) : 2 - 24: (5+3)
e) (25+20): 5 - (19 + 5): 8
f) 10 +(10:10 + 10) - (10 x 1 + 10)​

Answer 1

a) 32:8=4

b) 24-24:3*2:4*5=44

c) 36:6+4*2*5-16=30

d) 42:7+12:2-24:8=9

e) 45:5-24:8=6

f) 10+11-20=1

Answer 2

Explicație pas cu pas:

a) (18+2×7):(12:2+8:4)=

=(18+14):(6+2)

= 32:8

= 4

b) 24 - 24:3 ×(72:9-2×3):4×5=

= 24 - 8×(8 - 6):4×3

= 24 - 8×2: 4×5

= 24 - 16:4×5

= 24 - 4×5

= 24 - 20

= 4

c) 36:6+4×2×5-(20-12:3)=

= 6+8×5-(20-4)

= 6+40-16

=46-16

=30

d) 42:7+(6+6):2-24:(5+3)=

= 6+12:2-24:8

= 6+6-3

= 12-3

= 9

e) (25+20):5-(19+5):8=

= 45:5-24:8

= 9-3

=6

f) 10+(10:10+10)-(10×1+10)=

= 10+(1+10)-(10+10)

= 10+11-20

= 21-20

= 1