Question

+ Calculează, respectând regulile învățate. A. (8 + 9) * (80 – 69) b. 100:10 x (7 + 3) c. (7-7) x 9 +5 * 5 * 5 d. 89 - 35: (5 + 2) + 43 e. (45 + 25 – 34):(56:8 - 1) f. 7 x 4 + (87 – 79) x (36 : 4) g. 47 + 5 x (32 - 25) - 8 x 7 h. 36:4 (63:9 + 6 x 7) - 42:6 i. (4 x 3 + 5 x 4) : (6 8,5 x 8) j. (87 + 6 x 19+45:3) - (50 x 2 +43 x 2) :​.

Answer 1

Răspuns:

a) (8+9)×(80-69)=

17×11=187

b) 100:10×(7+3)=

100:10×10=

10×10=10

c) (7-7)×9+5×5×5=

=0×9+5×5×5=

=0+25×5

=0+125

=125

d) 89-35:(5+2)+43=

=89-35:7+43

=89-7+43

=82+43=125

e) (45+25-34):(56:8-1)

=(70-34):(7-1)

=36:6=6

f) 7×4+(87-79)×(36:4)

=7×4+8×9

=28+72

=100

g)47+5×(32-25)-8×7

=47+5×7-8×7

=47+35-56

=82-56

=26

h)36÷4×(63:9+6×7)-42:7

=36:4×(7+42)-6

=9×49-6

=441-6=435

(87+6×19+45:3)-(50×2+43×2)

(87+114+15)-(100+86)

(201+15)-186

216-186

30