Only Math
26th December 2008, 02:20 PM
سرعت انتقال و محاسبات ذهنی
0×9+1=1
1×9+2=11
12×9+3=111
123×9+4=1111
1234×9+5=11111
12345×9+6=111111
123456×9+7=1111111
1234567×9+8=11111111
12345678×9+9=111111111
----------------------------
1×8+1=9
12×8+2=98
123×8+3=987
1234×8+4=9876
12345×8+5=98765
123456×8+6=987654
1234567×8+7=9876543
12345678×8+8=98765432
123456789×8+9=987654321
---------------------------
9×9 =81
99×99 =9801
999×999 =998001
9999×9999 =99980001
99999×99999 =9999800001
999999×999999 =999998000001
9999999×9999999 =99999980000001
------------------------
999999×2=1999998
999999×3=2999997
999999×4=3999996
999999×5=4999995
999999×6=5999994
999999×7=6999993
999999×8=7999992
999999×9=8999991
-----------------
0×9+8=8
9×9+7=88
98×9+6=888
987×9+5=8888
9876×9+4=88888
98765×9+3=888888
987654×9+2=8888888
9876543×9+1=88888888
98765432×9+0=888888888
0×9+1=1
1×9+2=11
12×9+3=111
123×9+4=1111
1234×9+5=11111
12345×9+6=111111
123456×9+7=1111111
1234567×9+8=11111111
12345678×9+9=111111111
----------------------------
1×8+1=9
12×8+2=98
123×8+3=987
1234×8+4=9876
12345×8+5=98765
123456×8+6=987654
1234567×8+7=9876543
12345678×8+8=98765432
123456789×8+9=987654321
---------------------------
9×9 =81
99×99 =9801
999×999 =998001
9999×9999 =99980001
99999×99999 =9999800001
999999×999999 =999998000001
9999999×9999999 =99999980000001
------------------------
999999×2=1999998
999999×3=2999997
999999×4=3999996
999999×5=4999995
999999×6=5999994
999999×7=6999993
999999×8=7999992
999999×9=8999991
-----------------
0×9+8=8
9×9+7=88
98×9+6=888
987×9+5=8888
9876×9+4=88888
98765×9+3=888888
987654×9+2=8888888
9876543×9+1=88888888
98765432×9+0=888888888