Question

2 Calculează, respectând ordinea efectuării operațiilor. a) 285-28:4+ 9x 5-150 = b) 347 + 869-405-5 X 18:9= 10 x 26 - 18 x 5 + 16:2= 56:7 X 25 + 38 x 10 X 9 - 1786 = 1879 +4x3:2-318 x 5 = 4205 - 15 x 34 + 70:7 x 48 =​

Answer 1

a) 285-7+45-150=278+45-150=323-150=173

b) 347+869-405-5×18:9=1216-405-5×2=811-10=801

c) 10×26-18×5+16:2=260-90+8=170+8=178

d) 56:7×25+38×10×9-1786=8×25+380×9-1786=200+3420-1786=3620-1786=1834

e) 1879+4×3:2-318×5=1879+6-1590=1885-1590=295

f) 4205-15×34+70:7×48=4205-510+480=3695+480=4175

Answer 2

a) 285-28:4+9x5-150
=285-7+45-150
=278+45-150
=323-150
=173

b)347+869-405-5x18:9
=347+869-405-90:9
=347+869-405-10
=1216-405-10
=811-10
=801

c)10x26-18x5+16:2
=260-90+8
=170+8
=178

d)56:7x25+38x10x9-1786
=8x25+380x9-1786
=200+3420-1786
=3620-1786
=1834

e) 1879+4x3:2-318x5
=1879+12:2-318x5
=1879+6-1590
=1885-1590
=295

f)4205-15x34+70:7x48
=4205-510+10x48
=4205-510+480
=3695+480
=4175