a) 60 -26,75-13,25 b)45,28+ 5,17- 15,28-12,17 c) 38,25- 18,25+21,64-11,64+9,93 d)(72,69+18,47)- (8,47+22,69) e) 96,28 x 3,2

2 bình luận về “a) 60 -26,75-13,25 b)45,28+ 5,17- 15,28-12,17 c) 38,25- 18,25+21,64-11,64+9,93 d)(72,69+18,47)- (8,47+22,69) e) 96,28 x 3,2”

1.  

   Lời giải và giải thích chi tiết:

   a)=60-( 26.75+13.25)

      =60-40

       =20

   b)=(45.28-15.28) + (12.17-5.17)

       =30+7

        =37

   c)=(38.25-18.25)+(21.64-11.64)+9.93

       =20+10+9.93

        =39.93

   d)=(72.69-22.69)-(18.47-8.47)

       =50-10

        =40

   e)=3.27 x(96.28+3.72)

       =3.27 x 100

        =327

   f)=4.86x(0.25×40)

      =4.86 x10

       =48.6

   g)=72.9×99+72+0.9

       =72.9×99+72.9

       =72.9 x (99+1)

        =72.9 x 100

         =7290

   h)=(0.125 x80)x6.94

       = 10 x 6.94

         =69.4

   i)=0.8×96+1.6×2

      =1.6×48+1.6×2

       =1.6x(48+2)

        = 1.6x 50

         =80

   Chúc bạn học giỏi cho mình 5sao nhé

   Thanks you bạn !

   Trả lời
2. a) 60 – 26,75 – 13,25 = 60 – ( 26,75 + 13,25 ) = 60 – 40 = 20

   b) 45,28 + 5,17 – 15,28 – 12,17 = ( 45,28 – 15,28 ) + ( 5,17 – 12,17) = 30 + (-7) = 23

   c) 38,25 – 18,25 + 21,64 – 11,64 + 9,93 = (38,25 – 18,25) + ( 21,64 – 11,64) + 9,93 = 20 + 10 + 9,93 = 39,93

   d) (72,69 + 18,47) – (8,47 + 22,69) = 72,69 + 18,47 – 8,47 – 22,69 = ( 72,69 – 22,69) + ( 18,47 – 8,47) = 50 + 10 = 60

   e) 96,28 x 3,27+3,527x 3,72 = 3,72 × ( 96,28 + 3,572) = 3,72 × 99,852 = …

   f) 4,86 x 0,25 x 40 = 4,86 × 10 = 48,6

   g) 72,9 x 99 + 72 + 0,9 = 72,9 × 99 + 72,9 = 72,9 ( 99 + 1 ) = 72,9 × 100 = 7290

   h) 0,125 x 6,94 x 80 = 10 × 6,94 = 69,4

   i) 0,8 x 96 +1,6 x 2 = 1,6 × 48 + 1,6 × 2 = 1,6 × (48+2) = 1,6 × 50 = 80

   Trả lời