a: \(2\cdot25\cdot4\cdot50\)

\(=\left(2\cdot50\right)\cdot\left(25\cdot4\right)\)

\(=100\cdot100=10000\)

b: \(\left(-125\right)\cdot5\cdot\left(-16\right)\cdot\left(-8\right)\)

\(=-125\cdot5\cdot16\cdot8\)

\(=-\left(125\cdot8\right)\cdot\left(5\cdot16\right)\)

\(=-80\cdot1000=-80000\)

c: \(5^2\cdot3^3\cdot2\)

\(=25\cdot27\cdot2\)

\(=\left(25\cdot2\right)\cdot27=27\cdot50=1350\)

d: \(\left(-4\right)\cdot3^2\left(-5\right)^3\)

\(=\left(-4\right)\cdot\left(-125\right)\cdot9\)

\(=500\cdot9=4500\)

a: =400-450+50=0

c: =3+45=48

a ) 3 4 b ) 23 6 c ) 29 35 d ) 16 11

a)  15, 37 – 12, 37) . 0,12 = 3. 0,12 = 0,36

b ) 6 5 12 : 2 3 4 + 11 1 4 . 1 3 − 1 5 = 77 12 : 11 4 + 45 4 . 2 15 = 77 33 + 3 2 = 23 6 c ) 5 6 : 0,125 − 2 1 4 − 0,6 . 10 11 = 5 6 : 1 8 − 9 4 − 3 5 . 10 11 = 155 11 d ) 1,4. 15 19 − 4 5 + 2 3 : 2 1 5 = 7 5 . 15 19 − 22 15 : 11 5 = 21 19 − 2 3 = 25 57 e ) ( − 1,2 ) . − 3 24 + 0,4 − 1 4 15 : 1 2 3 = − 6 5 . − 3 24 + 2 5 − 19 15 : 5 3 = − 37 100 f ) 1 13 15 .0,75 − 11 20 + 25 % = 28 15 . 3 4 − 11 20 + 1 4 = 3 5

a. 137-(-23)=137+23=160

b.\(3^3.75+25.3^3-34=3^3.\left(25+75\right)-34=27.100-34=2700-34=2666\)

a: =400+50-450=0

a. 4.37.25.50.12

  =(4.25).(50.12).37

  =100.600.37

  =2220000

\(a.\left(4.50\right).\left(25.12\right).37\)

\(=200.300.37=2220000\)

\(b.\left(46+54\right)+\left(17+83\right)\)

\(=100+100=200\)

\(c.87.\left(36+69\right)=87.105=9135\)

\(d.\left(135+65\right)+\left(360+40\right)\)

\(=200+400=600\)

\(e.\left(463+137\right)+\left(318+22\right)\)

\(=600+340=940\)