2,15 x 23,06 + 2,15 x 76,94 + 17,85

=2,15 x ( 23,06 + 76,94 ) + 17,85

=2,15 x 100 + 17,85

=215 + 17,85

=232,85

2.15 * 23.06 + 2.15 * 76.94 + 17.85

2.15 *[23.06+76.94+17.85]

2.15 *117.85

253.3775

2,15 x 23,06 + 2,15 x 76,94 + 17,85 

= 2,15 x ( 23,06 + 76,94 ) + 17,85 

= 2,15 x 100 + 17,85

= 215 + 17,85

= 232,85

\(2,15\times123,06-2,15\times23,06+17,8\)

\(=2,15\times\left(123,06-23,06\right)+17,8\)

\(=2,15\times100+17,8\)

\(=215+17,8\)

\(=232,8\)

\(2,15\times123,06-2,15\times23,06+17,8\)

\(=2,15\times\left(123,06-23,06\right)+17,8\)

\(=2,15\times100+17,8\)

\(=215+17,8\)

\(=232,8\)

a) \(2,15x23,06+2,15x76,94+17,85\)

\(=2,15x\left(23,06+76,94\right)+17,85\)

\(=2,15x100+17,85\)

\(=215+17,85\)

\(=232,85\)

b) \(72,7x54,32-44,32x72,7+27,3\)

\(=72,7x\left(54,32-44,32\right)+27,3\)

\(=72,7x10+27,3\)

\(=727+27,3\)

\(=754,3\)

a) 2,15 x 23,06 + 2,15 x 76,94 + 17,85

= 2,15 x ( 23,06 + 76,94 ) + 17,85

= 2,15 x 100 + 17,85

= 215 + 17,85

= 232,85

b) 72,7 x 54,32 - 44,32 x 72,7 + 27,3

= 72,7 x ( 54,32 - 44,32 ) + 27,3

= 72,7 x 10 + 27,3

= 727 + 27,3 

= 754,3

Hok tốt !

  2,15 : 0,1 + 2,15 x 7 + 2,15 : 0,5 + 2,15

=2,15 x 10  + 2,15 x 7 + 2,15 x2    + 2,15 x 1

=2,15 x ( 10 + 7 + 2 + 1 )

= 2,15 x 20

=  43 

OK CHÚC BẠN HỌC TỐT !!!  

=2,15 x 10 + 2,15 x 7 + 2,15 x 2 + 2,15 x 1

=2,15 x (10+7+2+1)

=2,15 x 20 = 43

2,15 : 0,1 + 2,15 x 7 + 2,15 : 0,5  + 2,15

= 2,15 : 0,1 + 2,15 : 0,5 + 2,15 x 7 + 2,15 x 1

= 2,15 : (0,1 + 0,5) + 2,15 x (7 + 1)

= 2,15 : 0,6 + 2,15 x 6

= 2,15 x \(\frac{3}{5}\) + 2,5 x 6

= 2,15 x (\(\frac{3}{5}\) + 6)

= 2,15 x \(\frac{33}{5}\)

= \(\frac{1419}{100}\)= 14,19

a, 4,05 × 38,6 + 4,05 × 61,54

= 4,05 × ( 38,6 + 61,54 )

= 4,05 × ( 38,6 + 61,54 )

= 4,05 × 100

= 405

b, 2,15 × 23,06 + 2,15 × 76,94

= 2,15 × ( 23,06 + 76,94 )

= 2,15 × 100

= 215

c, 72,7 × 54,32 - 44,32 × 72,7

= 72,7 × ( 54,32 - 44,32 )

= 72,7 × 10

= 727

a 4,05 × 38,6 + 4,05 × 61,54

= 4,05 x ( 38,6 + 61,54 )

= 4,05 x ( 38,6 + 61,54 )

= 4,05 x 100 = 405

b 2,15 x 23,06 + 2,15 x 76,94

= 2,15 x ( 23,06 + 76,94 )

= 2,15 x 100 = 215

c 72,7 x 54,32 - 44,32 x 72,7

= 72,7 x ( 54,32 - 44,32 )

= 72,7 × 10 = = 727

a: =4,05(38,66+61,54)=405

b: =2,15(23,06+76,94)=215

c: =72,7(54,32-44,32)=727

4,3 * 6,5 + 2,15 * 37 + 2,15 * 27 - 2,15

= 2,15 * 13 + 2,15 * 37 + 2,15 * 27 - 2,15

= 2,15 * ( 13 + 37 + 27 - 1 )

= 2,15 * 76

= sai đề

Mình chưa tìm ra cách giải???

mọi người giúp tớ với

2,15 x 75 + 2,15 : 0,04

2,15 x 75 + 2,15 x 25

2,15 x ( 75 + 25)

= 2,15 x 100

= 215 

2,15 x 75 + 2,15 : 0,04

= 2,15 x 75 + 2,15 x 25

= 2,15 x (75 + 25)

= 2,15 x 100

= 215

a: =(41,5+15,5)x4=57x4=228

b: =13,6x8+34,4x8=50x8=400

c: =135 giây+135 giây+135 giây x8

=135x10=1350 giây

1

1

Cách 1: (2,15 + 3,85) x 1,2
= 6 x 1,2
= 7,2
Cách 2: (2,15 + 3,85) x 1,2
= 2,15 x 1,2 + 3,85 x 1,2
= 2,58 + 4,62
= 7,2