,
5 10,
, .
1. 11
, 10,
,
, 11?
, 63 11.
, 11
:
6_3
:
6_(6+3)_3
:
63*11=693
,
, :
79*11=
7_(7+9)_9
(7+1)_6_9
79*11=869
2. , 5
, 5,
.
25, :
45*45=4*(4+1)_25=2025
3. 5
5 ,
, 5?
2.
, 0 ,
, 5 :
1248*5=(1248/2)_(0 5)=624_(0 5)=6240 ( 2 )
4469*5=(4469/2)_(0 5)=(2234.5)_(0 5)=22345 ( 2 )
4. 4
, , 4,
.
4,
2, 2:
67*4=67*2*2=134*2=268
5. 15%
15% - ,
, .
10% ( 10)
10%.
15% 884 =(10% 884 )+((10% 884 )/2)=88.4 + 44.2 = 132.6
6.
,
,
,
:
32*125
16*250
8*500
4*1000=4000
7. 5
5 .
, 2 :
175/5
2: 175*2=350
: 35.0 35
1244/5
2: 1244*2=2488
: 248.8
8. 1000
, ,
9, ,
10:
1000-489=(9-4)_(9-8)_(10-9)=511
, , , ,
.
5 , , 5?
