Slide 1

:

. . 10 . 0 1 2 3 4 5 6 7 8 9

, , . , . : , .

IV III II I - 12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2 : .

- 1 000 000 000 000 - 1 000 000 000 000 000 - 1 000 000 000 000 000 000 - 1 000 000 000 000 000 000 000 - 1 000 000 000 000 000 000 000 000 - 1 000 000 000 000 000 000 000 000 000 - 1 000 000 000 000 000 000 000 000 000 000 11- 11 - ?) 10- , . . : ) 23 11 = 253 ) 62 11= 682

11- ) 10 - 10 - , , . , 1) 75 11 =805( 7+5=12, 2 7- 5- , 1 7-).2) 95 11= 1045( 9+5=14, 4 9- 5- , 1 9-)

11- :

3611 =8711 =6111 =9211=

5- 5- 2 - 10-., 385 : 5= 3852=770 770: 10 =77

5- 5- 85 : 5= 115: 5=

0- 5- 10- 2-., 310:5= 310: 10= 31 312 = 62

0- 5- 430: 5=750:5 =

101- 101- ., 65 101 = 6565 85 101 = 8585

101- 67 x 101 =89 x 101=59 x 101=

! , , 10- ., 8486?

84 80, 8690 8090 = 7 2003. 7 200 + 46= 7 200 +24= 7 224: 84 86 =7 224

: 17 13 44 46 53 57 89 81

25- 25- 4-., 32 25=3200: 4= 800 25- 16x25 =28x 25 =36 x25 =

125- 125 - 8-. , 74 125 = 74000 : 8 = 9 250 125- 64x125 =48x125 =32x125 =

25., 65 = , ..7- 25.65 = 67= 42 25; 4 22555 = 3025

, . .,125 = 13 225 ( 12 - 13- 25) 45 =75 =35 =85 =

, ( ). , , : ( ) , .2. , , , .

2,352 : 6 = 392 18 55 54 12 12 0 ) , , ( ) 2 352 : 6 = ... . 2 3,52 : 12 = 196 12 115 108 72 72 0) , 1- . 2352 : 12 = ... .

, , . , 12 = 144 21 = 441 13 = 169 31 = 961 102 =10404 201 = 40401 112 = 12544 211= 44521 122= 14884 221 = 48841 113 = 12769 311 = 96721

. , . - 27 -, .

37 * 3 = 111 37 * 6 = 222 37 * 9 = 333 37 * 12 = 444 37 * 15 = 555 37 * 18 = 666 37 * 21 = 777 37 * 24 = 888 37 * 27 = 999

1 9 + 2 = 11 12 9 + 3 = 111 123 9 + 4 = 1111 1234 9 + 5 = 11111 12345 9 + 6 = 111111 123456 9 + 7 = 11111111234567 9 + 8 = 11111111 12345678 9 + 9 = 111111111

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

, , , :

12345679 * 9 = 111111111 12345679 * 18 = 222222222 12345679 * 27 = 333333333 12345679 * 36 = 444444444 12345679 * 45 = 555555555 12345679 * 54 = 666666666 12345679 * 63 = 777777777 12345679 * 72 = 888888888 12345679 * 81 = 999999999

2014