نشاط 4 ص 48 :
(5 - ) = 5 - *
(2 + 3) (2 - 3 ) = - = 4 - 9 *
- *
[(1+ 4)-(3- 2)][(1+ 4)+(3- 2)] =
(4 - 2- ) (2 - 6 ) =
(7 - 4) (3 - ) - *
[ (7 - 4) – (3 - ) ] (3 - ) =
(7 + 4 - 3 - ) ( 3 - ) =
(4 + 3- ) ( 3 - ) =
( + 4) ( - 4 ) = - = - 16 = 16 + - *
2 – 25 ×2 = 2 – 50 *
- =
[(5 + 4) + 5] [(5 + 4) - 5] =
( 10 + 4 ) ( 4-) =
3 + 10 - 25 *
× 5 × 2 - + =
=
- = 0.01 - 1.44 *
(0.1 + 1.2) (0.1 - 1.2) =
1× 5×2 + + = 1 + 10 + 25 *
=
( 2 -1 ) 2 = 4 – 2 *
( 9 – 1 ) = 9 - *
(3 - 2) 4+ (3 - 2) *
(5+ 6- 9)(3- 2) =[4 + ] (3 - 2) =
= 2 × × 2 - + = 4 + 4 - *
× ×2 + + = + + *
= =
نشاط 5 ص 48 :
18+ 3 + = 9 + 3 - *
لدينا 9+ 3 - 6 + 9 + = 9 + 3 -
18+ 3 + =
فالمساواة صحيحة
(3- 4)(1- 2)=( -5) (1- 2)-(2+ 3)(1- 2) *
لدينا = ( -5) (1- 2)-(2+ 3)(1- 2)
[( -5) (2+ 3) ] (1- 2)
( +5-2+ 3) (1- 2) =
(3- 4)(1- 2) =
فالمساواة صحيحة
(2+ ) ( - ) = - *
لدينا [ +( + )][ - ( + )] = -
( + + ) ( - + ) =
(2+ ) ( - ) = ( + ) ( - ) =
فالمساواة صحيحة
نشاط 6 ص 48 :
3- = 9 – 6 = - = (3 + ) (3 - ) *
100000 = = =81+ 9 × 109 ×2 - *
(0.002-1)(0.002+1) = 0.998×1.002*
0.9999996 =1- 0.000004= - =
7 = (5 - 4) ( 5 + 4) *
3- = ( + )( - ) *
400 =200×2 =(99 + 101) (99 - 101) = - *
2800 =100×18 = (75 +25 )28 =75×28 + 25×28 *
360000 = = = + 6× 594×2+ *
ولو العفوووو اخي
( تقرير عن مشاركة سيئة )، و الموجودة أسفل كل مشاركة .
2011-01-12, 19:31
اذا مادخلتوش...سوف اعصب....ادخلوووو
العرض العادي
