Question

thực hiện pháp tính

a, 600 : {300:[200-(30+8.20)]}

b,4² .5³ -(2015⁰+8) :3²

c, 25.75+25.16+5.45

 

Answer 1

a) 600:{300:[200 - (30 + 8.20)]}

= 600:{300:[200 - 190]}

= 600:{300 : 10}

= 600 : 30 

= 20

b) 4².5³ - (2015⁰ + 8) : 3²

= 16.125 - (1 + 8) : 9

= 2000 - 1

= 1999

c) 25.75 + 25.16 + 5.45 

= 25.75 + 25.16 + 5.5.9 

= 25.75 + 25.16 + 25.9

= 25.(75 + 16 + 9)

= 25.100

= 2500

Answer 2

c)

25.75+25.16+5.45

=25.75+25.16+5.(5.9)

=25.75+25.16+5.5.9

=25.75+25.16+25.9

=25.(75+16+9)

=25.100

=2500

Answer 3

a,600 : {300:[200-(30+8.20)]}

=600 : {300:[200-(30+160)]}

=600 : {300:[200-190]}

=600 : {300:10}

=600 : 30

=20

b,4².5³-(2015⁰+8):3²

=16.125-(1+8):9

=2000-9:9

=2000-1

=1999

c,25.75+25.16+5.45

=1875+400+225

=2275+225

=2500

Answer 4

a) 600 :{300:[200-(30+160)]}

= 600:{300:[200-190]}

= 600:{300:10}

= 600:30

= 20

Answer 5

b 

= 16.75 -(1+8);9

= 2000-1

= 1999

c

= (1875+400)+225

=2275+225

= 2500