Question

[Hòa Nguyễn]

Tính bằng 2 cách

A = 26,54 × 27 – 26,54 × 17

B = 9,03 × 24 + 9,03 × 76

C = 5,21 × 83 – 79 ×  5,21 + 5,21  × 6

D = 8,5 × 11 + 88 × 8,5 + 8,5

Answer 1

[Lấp La Lấp Lánh]

Cách 1:

\(A=26,54\times\left(27-17\right)=26,54\times10=265,4\)

\(B=9,03\times\left(24+76\right)=9,03\times100=903\)

\(C=5,21\times\left(83-79+6\right)=5,21\times10=52,1\)

\(D=8,5\left(11+88+1\right)=8,5\times100=850\)

Cách 2:

\(A=716,58-451,17=265,4\)

\(B=216,72+686,28=903\)

\(C=432,43-411,59+31,26=52,1\)

\(D=93,5+748+8,5=850\)

Answer 2

[Nguyễn Khánh Quỳnh]

   A = 26,54 x 27 - 26,54 x17

C1 := 716,58 -  451,18

       = 265,4

C2: = 26,54 x ( 27 - 17 )

       = 26,54 x 10

       = 265,4

  B = 9,03 x 24 + 9,03 x 76

C1 = 216,72 + 686,28

      = 903

C2 = 9,03 x ( 24 + 76 )

      = 9,03 x 100

      = 903

C = 5,21 x 83 - 79 x 5,21 + 5,21 x 6

C1 = 432,43 - 411,59 + 31,26

      = 20,84 + 31,26

      = 52,1

C2 = 5,21 x ( 83 - 79 + 6 )

      = 5,21 x 10

      = 52,1

D = 8,5 x 11 + 88 x 8,5 + 8,5

C1 = 93,5 + 748 + 8,5

      = 850

C2 = 8,5 x 11 + 88 x 8,5 + 8,5 x 1

      = 8,5 x ( 11 + 88 + 1 )

      = 8,5 x 100

      = 850