#초등기초수학(001~006)

#초등기초수학(0~006) 23..25 0:5 PM 페이지 다민 250DPI 75LPI 하나를 알면 0개, 20개를 풀 수 있는 개념원리수학 이홍섭 지음

GAE NYEOM WON RI Mathematics rsearch institute

0000 3, 000 6, 00 7, 0 2, 3672, 7089 ( ) 65978 ( ) 0 0000 0 00000 0, 0000 00 000000 00, 0000 000 0000000 000, 000 0 00000000, 000 0 000000000000, 2852036723800 28 520 3672 3800 35076829006072 3507 682 900 6072 3507 682 900 6072 3507 682 900 6072 8

2 0000 0000+3000+90+5=3095 0000 000 3 00 0 0 9 5 000 000 000 000 3095 2 36958723 36958723 3, 6958, 723 6 60000000 3 6958 723 3 6958 723 3 6958 723 3 6 0 0 0 0 0000 60 600 6000 6 0 0 0 0 6 0 >, =, < 80732 < 8269 683297 < 725 65 > 288 3603 3 725 58 < 288 389 8 0732 < 8 269 68 3297 < 68 5092 0<2 3<5 725 65 > 725 58 288 3 603 3 < 288 3 89 6>5 6<8 I. 9

978+5 978+5= 32 9 7 8 + 5 3 2 8+=2 2, +7+5=3 3, +9+=, 6 7 8 6 7 8 + 3 8 7 23 + 3 8 7 23 5 6 7 8 + 3 8 7 23 6 5 6 7 8 + 3 8 7 23 0 6 5 25 + 297 20 70 5 290 7 2 722 20 290 5 7 225 + 297 300 3 725 722 25 297 300 3 698+72 698 72 700 72 2 698+72=( 700-2 )+72=( 700 +72)- 2 = 2-2 = 698 72 2722 22 698+72=698+(2+ 722 )=(698+2)+ 722 = 700 + 722 = 22 0

2 26+739=003 96+877=823 5 2 8 8 5 7 +7 9 6 +3 9 2 2 3 2 2 5 2 6 9 6 +7 3 9 +8 7 7 0 0 3 8 2 3 2 >, =, < 596+668 < 957+386 86+89 > 85+558 596+668=26, 957+386=33 26<33 86+89=053, 85+558=03 053>03 3 227 230 3 227 + 598 230 820 3 590 8 825 5 605 + 9 60 5 605 60 5 9 0 9 60 0 9 5 750 75 0 9 598 590 8 230 590 8 3 3 66, 636 = + =66+636=300 ( 300 ) I.

03 35-97 35-97= 238 3 2 0 X X3 5-9 7 2 3 8 5-7=8 8, 2 2-9=3 3, 3 3-=2 2 3 5 7-7 9 23 0 3 X5 7-7 9 23 8 2 0 X3 X5 7-7 9 23 7 8 2 X3 X5 7-7 9 23 7 0 8 322-9 2322-9 200 6 322+6 9+6 22 328 200 28 28 322 9 200 6 322 9 6 63-293 63 293 3007 63-293=63-300 + 7 =(63-300 )+ 7 = 33 + 7 = 63 2937 63-293=(63+ 7 )-(293+ 7 )= 638-300 = 338 338 2

3 60-53=57 52-387=3 7 9 0 3 2 0 X8 0 X X3 5-5 3 8-6 2 2 2 6 6 2 8 9 5 0 0 X6 X 0 0 X5 X2-5 3-3 8 7 5 7 3 2 >, =, < 972-378 > 73-38 708-579 < 0-255 972-378=59, 73-38=593 59>593 708-579=29, 0-255=9 29<9 99 3 00 99-99 63-96 00 2 22 600 3 0 7 73 385 = - =73-385=39 ( 39 ) I. 3

0, _ 5 7 _ 3 5 2 7 3 5 6 9 5 5 6 5 2 9 5 9 _ 2 8 5 _ 3 6 5 _ 2 9 5 3 6 8 3 7 5 3 6 2 8 _ 3 5 7 9 2 5 2 7 6 8 5 8 7 5 9 0 8 8 5 7 2 2 6 9 9 2 5 0 6 6 7 50=300 7 6 8 68 5 0 25 6 8 3 0 0 300 7 50=300 200 300 7 _2 0 0 3 0 0 _50 27_6_73= 728 _73= 26 3_9_5=3_ 970 = 70

3 5, 5, 25 5 2 5 3 5 9 0, 2,, 6, 8 _ 2 7 _ 3 7 7 2 0 7 6 5 0 6 5 5 7 6 8 3 7 6 6 8_2_36=692 8_2_36=92_36=692 25_8_7=200_7=800 25_8_7=800 >, =, < 2 99_9 > 637_68 37_8_29 > 65 99_9=509, 637_68=336 509>336 37_8_29=296_29=858 65 =660_=7260 858>7260 3 7 2 9 _ 5 3 3 6 5 2 9 6 3 6 5 6 7 2 9 _ 5 3 3 6 5 2 9 6 3 3 2 8 0 5 6 2 2 2 _6=2 2 _6_2=2_2=288 ( 288 ) I. 5

05 8X0 2X0= 566 70= 8 y 6 8 2= 20< 80 80 70_8+6=566 0 8 70< 566 560 6 7 8 0< 280 90< 720 0< 89 70< 52 2 8 0 7 2 0 6 0 9 0 0 0 29 3 7 7 32< 27 22 7 ( ) ( ) 8 32< 27 256 5 ( ) 9 32< 27 288 () 27 32= 8 y 5 () 32_8 +5=27 2 32< 66 8< 78 3< 268 8< 729 6 7 2 2 3 8 8 7 5 2 6 3 0 2 9 2 0 9 6

_+ = 7 60< 67 7< 73 2 0 6 8 7 5 68< 327 2 7 2 5 5 60_7+7=67 5 8< 273 8 9 3 9 0 3 7_+5=73 68_+55=327 8_5+3=273 2 93 30 57 65 29 73 367 58 93 30=6y3 57 65=8y5 29 73=5y6 367 58=6y9 ( ) 3 7 =2_9+8=7 2=9y8 =y =_+ 68 58, 68 58=y6 6 ( )( 6 ) I. 7

06, 0-5_3+9=3() 5 25 3 0-5_3+9=() 35 05 36+6_5= 66 98-8_7-29= 3 30 56 66 2 3 36+6_5=36+30=66 98-8_7-29=98-56-29=2-29=3, 28+60-2=() 28+60-2=23() 0 88 68 7 23 2-56 8= 35 6+36 6-7= 60 7 6 35 67 60 2-56 8=2-7=35 6+36 6-7=6+6-7=67-7=60 8

5 9+7_8-63=2 72-9_3+6=6 80-2 6+3=86 75 5-56 7=7 9+7_8-63=9+56-63=05-63=2 72-9_3+6=72-27+6=5+6=6 80-2 6+3=80-7+3=73+3=86 75 5-56 7=5-8=7 ( 2 ) 8 6_7=56 6_8 =2 2_ 3=32 8 3_2=72 35 5_7= 35 5_7=7_7=9 3 >, =, < 8+7_5-25=8+35-25=83-25=58 00-5+8 2=00-5+9=55+9=6 58<6 8+7_5-25 < 00-5+8 2 3 2580 280 2580 3, 280 2580 3-280 =50 860 70 50 2580 3-280 =50 50 I. 9

07 ( ) ( ) 000-(250+300)=50() 550 50 000-(250+300)=050() 750 050 (2-7)+6= 7_(+5)= 63 5 9 63 (2-7)+6=5+6= 7_(+5)=7_9=63,,,, ( ), { } ( ) { } _5+0 {6-(2+)}-6=8 20 6 2 0 8 72-{8_(+5) 6}= 60 _{52 (6-2)+9}= 308 9 72 3 2 22 60 308 72-{8_(+5) 6}=72-(8_9 6)=72-(72 6)=72-2=60 _{52 (6-2)+9}=_(52 +9)=_(3+9)=_22=308 20

5 {30+6 (2-6)}_+20 ( ) { } ( ) { } 30+6 2-6_+20=5 6 (,,,, ) 3 2 3 5 ( ) { } ( ) 3_{(5-6) 3+} =3_(5-2+) =3_(3+) =3_7 =5 3_5-6 3+ =3_9 3+ =3_3+ =3_7 =2 3, 9-{7_(6-)+38}=2 8+3_{(7-8)_2}=72, 3_{(-3)_}-2=75 9 {2-(3-8)}+9=26 9-7_6-+38=9-7_5+38=9-73=2 8+3_7-8_2=8+3_9_2=8+5=72 3_-3_-2=3_8_-2=3_32-2=96-2=75 9 2-3-8+9=9 2-5+9=9 7+9=7+9=26 20 5 7 20_5 2-7=3 00 50 3 20_5, 20_5 2 7 20_5 2-7=3 20_5 2-7 3 I. 2

7265 ( ) 580730 ( ) 7 265 5807 30 ( 50872 ) ( 2030700080000 ) 0 03 826+78=30 595+607=2 2 7 7 3 9 8 +5 9 6 +9 6 2 2 8 7 3 3 6 2 8 2 6 5 9 5 + 7 8 +6 0 7 3 0 2 0 2 0 532-97=335 506-279=227 6 0 0 8 0 X7 X 5 X9 X5 5-3 9 6-8 6 2 2 3 9 7 6 9 2 0 9 0 X5 X3 2 X5 0 6-9 7-2 7 9 3 3 5 2 2 7 22

6 05 06 5 8 _ 5 2 2 9 6 2 2 9 0 35 2 3 8 6 598_65=38870 5 9 8 _ 6 5 2 9 9 0 3 5 8 8 3 8 8 7 0 6 60< 365 3 6 0 5 9 2 _ 7 0 6 6 8 0 2_5_=590 2_5_=50_=590 3 22< 78 6 6 2 60_6+5=365 22_3+2=78 7 63< 9 8 2 6 35< 96 7 0 2 6 2 0 6 63_7+8=9 35_26+6=96 _+= 07 32+2_-6_2=96 59-72 +32 8=5 32+2_-6_2=32+96-32=28-32=96 59-72 +32 8=59-8+=+=5 08 8+3_(8_7-2) 9=36 8+3_(8_7-2) 9=8+3_(56-2) 9=8+3_5 9=8+8=36 (8-60) _{25-(2+5)}=2 _(25-7)=2 _8=6_8=8 (8-60) _{25-(2+5)}=8 I. 23

5 7 0 0 7 2 6 X8 X 3 607+398 + 8 5-2 5 2 2 2 5 5 9 600 7 00 2 2 3 5 _8 0 0 2 8 0 0 0 2 7 _ 5 6 6 3 7 0 5 3 826 3907 8263907 6 000 005 607 600+7, 398 00-2 600 00 7 2 35_7_6 5 3_9_60 607 3052 6073052 0 35_7_6=25_6=70 3_9_60=27_60=620 70<620 ( ) 3 7560000000 ( ) 7 8 8< 897 8 7 3 8 3 3 53096300070920 ( ) 8_8+33=897 _+= 756 000 0000 5309 6300 0709 20 8 659 87 927 897 658 92 63 50 553 60 57 76 927, 658 9 2 7 8 0 X9 X2 7 +6 5 8-6 5 8 5 8 5 2 6 9 ( 585 ) ( 269 ) (, ) 92 =y8 63 50=2y3 553 60=9y3 57 76=7y2, 2

9 0 ( 8 ) 509 200 200 70 5 092 0 0 0 0 07 0 8 3 7 58 ( 57 ) 58 57 0 6-27+9=6 37 6 57-28+5 29 = 530 270 890 ( 50 ) =530-270=260 =260+890=50 ( ) ( ) 5 87 78 926 2 35 (7-2) 22+(2-)_3 37-(8 3) 6-(26+) 7_(0+2)-0 5 35 7-2=35 5=7 35 7-2=5-2=3 22+2-_3=22+8_3=6 22+2-_3=22+2-2=22 37-8 3=37-6=3 37-8 3=37-6=3 6-26+=6-30=3 6-26+=38+=2 7_0+2-0 5=7_2-8=76 7_0+2-0 5=70+2-8=6 00-{8-27_(5+3) }+6=52 00-8-27_5+3 +6 =00-8-27_8 +6 =00-8-26 +6 =00-8-5+6 =00-6+6 =36+6=52 6 ( 5 ) +78=926 =926-78=78 78+87=5 96 55 _ =96_55=52030 ( 52030 ) I. 25

08 09 0 2

08 6, 2, 3, 6, 2, 3, 6 6 8, 2,, 8 2, 2, 3,, 6, 2, 2, 8 2 8 2, 2, 8 2 8 2 2> 8 2 2> 6 2 3 2_2= 8 2 6 20 6 20 6 20, 2,, 8, 6, 2,, 5, 0, 20, 2, 6 20 5, 2, 3,, yy 5, 0, 5, 20, yy 5 2 2, 2, 36, 8, 60, 72, yy 8 8, 36, 5, 72, yy 36, 72, yy 2 8 2 8 36, 72, yy 2 8 36 2 8 2> 2 8 3> 6 9 2 3 2_3_2_3=36 2 8 6 8 6 8 6 8 6, 2, 8, 2, 30, 36, 2, 8, yy 8, 6, 2, 32, 0, 8, yy 2, 8, yy 6 8 2 28