Question

Calculeaza,respectand regulile invatate.
a)(5+5×3)×3-(3×25+24):3
b)(25+25)×3-(25+25×3)
c)400-2×10+(650+310):10
d)8+3×(12:4+21:7:3)
e)10+10:(10×10-10×9)
f)127+(27:3-1)×8:2.

Answer 1

a)(5+5×3)×3-(3×25+24):3=
(5+15)x3-( 75+24):3=
=20x3- 99:3=
=60-33=27

b)(25+25)×3-(25+25×3)=
=50x3-100=
=150-100=50

c)400-2×10+(650+310):10=
=400-20+960:10=
380+96=
=476

d)8+3×(12:4+21:7:3)=
=8+3x(3+1)=
=8+3x4=
=8+12=
=20

e)10+10:(10×10-10×9)=
10+10:(100-90)=
=10+10:10=
=10+1=11

f)127+(27:3-1)×8:2=
=127+(9-1)x8:2=
=127+8x8:2=
=127+64:2=
=127+32=159