Subtraction Concepts (»¬¼À)
µ¡¼À¿¡ ÀÌ¾î »¬¼À°ú ³î¾Æ º¼±î¿ä...^^
µ¡¼Àµµ ¸¶Âù°¡Áö¿´Áö¸¸
»¬¼À¿¡¼µµ ¿¬»ê½Ã Ç×»ó ¾î¶² ¹°Ã¼(eg. counters)¸¦ ÀÌ¿ëÇØ ´«À¸·Î º¸°í È®ÀÎÇØ °¡¸ç
°è»êÇϵµ·Ï À¯µµ ÇÕ´Ï´Ù.
(¡ÚCounters : ÁÖ»çÀ§¸¦ ´øÁö¸ç ³îÀÌÇÒ ¶§ ¸» ¿ªÇÒÀ» ÇÏ´Â °ÍµéÀ» counter¶ó ºÎ¸£´Âµ¥¿ä.
¿¬»êÇ®À̽ÿ¡µµ À¯¿ëÇϳ׿ä.
ÁÖº¯ÀÇ ÀÛ°í °£´ÜÇÑ »ç¹°ÀÌ¸é ¾î¶²°ÍÀÌµç °¡´ÉÇÏÁö¿ä.
buttons, blocks, marbles,cereal pi-e-ces, crayongsµî
¾ÆÀÌÀÇ ÁÖº¯ÀÇ Ä£±ÙÇÑ °ÍÀ¸·Î ¼±ÅÃÇÏ¿© »ç¿ëÇØ º¸¼¼¿ä.)
mat ÇÑ Àå(a4Áö Á¤µµ¸é ÃæºÐÇÕ´Ï´Ù.) °ú
counters(Àú´Â °è¼Ó ÀÌ¿ëÇØ ¿À´ø ºí·°À» ÁÖ·Î ÀÌ¿ëÇÏ¿´¾î¿ä.)
¸é °£´ÜÇÑ »¬¼À½ÄÀº ¹®Á¦ ¾ø¾î¿ä.
¢Ä Vocabulary ¢Å
subtract | To take away to find out how many are left |
minus sign | The symbol for subtraction. |
difference | The answer to a subtraction problem |
subtraction sentence | An equation such as 6 - 2 = 4. |
¢Ä Try it out ¢Å
¾Æ·¡ ±×¸²Ã³·³ ¹®Á¦ÀÇ ¹è°æÀÌ µÉ ¸¸ÇÑ ±×¸²À» ¿ì¼± Á¦½ÃÇÏ°í
¾ÆÀÌ°¡ À̾߱⸦ ¸¸µé¸ç ¹®Àå½ÄÀ» ¿Ï¼ºÇØ º¾´Ï´Ù.
Show each story with counters.
(Ä«¿îÅ͸¦ ÀÌ¿ëÇØ °¢ À̾߱⸦ ³ªÅ¸³» º¸¼¼¿ä.)
Write the numbers.
(¼ýÀÚµµ ½á º¸¼¼¿ä.)
1. 10 apples 10 picked 0 left.
Áؼ´Â ºóÄ¿¡ 10,10,0 À» ä¿ö ³Ö³×¿ä..
Á» Ȳ´çÇß¾î¿ä..
Æò¹üÇÑ »¬¼À½ÄÀÌ ¾Æ´Ï¶ó¼.¤¾¤¾
±×¸®°í´Â ³ª¹«¿¡ ¾Æ¹«°Íµµ ³ªÅ¸³»Áö ¾Ê¾ÒÁö¿ä..¤¾¤¾
2. 9 pears 6 eaten 3 left.
ÇÏ°í´Â ±×¸²À¸·Î Ç¥ÇöÇß½À´Ï´Ù.
¢Ä »¬¼À½ÄÀ» ÀÌÇØÇÏ°í Ç®¾îº¸±â ¢Å
¿ì¼± ¾Õ¿¡ ¸»ÇÑ counter¸¦ ÀÌ¿ëÇØ °£´ÜÇÑ µ¡¼À½ÄÀ» Ç®¾î º¾´Ï´Ù.
ÀÌ Ã¥ÀÇ ¸Ç µÚ¿¡´Â ¿©·¯°¡Áö workmatµéÀÌ ºÙ¾î Àִµ¥¿ä.
»¬¼À½ÄÀ» Ä«¿îÅ͸¦ ÀÌ¿ëÇØ Ç®ÀÌÇÒ ¶§´Â ±×³É ¾Æ¹« ¼±µµ ¾ø´Â Å« ºó °ø°£°ú °°Àº mat¸¦ ÀÌ¿ëÇÕ´Ï´Ù.
(¾Æ·¡ Áؼ°¡ »ç¿ëÇÏ´Â mat »çÁø 󷳿ä.)
±× mat¿¡ Ä«¿îÅ͸¦ ³õ¾Ò´Ù Ä¡¿ü´Ù ÇÏ¸é¼ »¬¼ÀÀ» À¯µµ ÇÏÁö¿ä.
Á¦°¡ ³»¾îÁØ °£´ÜÇÑ »¬¼ÀÀ» ÇÏ°í ÀÖ½À´Ï´Ù.
¡Ú»¬¼À½ÄÀ» Ç®ÀÌ ½Ã Ç¥Çöµé
Show 4 counters. Ä«¿îÅÍ 4°³¸¦ ³ö ºÁ.
Take away 1. ÇÑ°³¸¦ Ä¡¿öºÁ(»©³»ºÁ).
How many are left? ¸î °³ ³²¾ÒÁö?
3 counters left. 3°³ ³²¾Ò´Ù.
We can use the minus sign and equals sign to write about subtraction.
- ¿Í =À» ÀÌ¿ëÇØ »¬¼À½ÄÀ» ³ªÅ¸³¾ ¼ö ÀÖ¾î.
Let's prectise how to subtract.
»¬¼ÀÇÏ´Â ¹æ¹ýÀ» ¿¬½ÀÇÏÀÚ.
You can cross out to subtract like this.
»©±â À§ÇØ ÀÌ·¸°Ô Áö¿ö ¾ø¾Ö¸é µÅ.
What math word tells you how many are left?
¾ó¸¶°¡ ³²¾Ò´ÂÁö´Â ³ªÅ¸³»´Â ¼öÇпë¾î°¡ ¹¹Áö?
The difference tells you how many are left.
difference´Â ¾ó¸¶°¡ ³²¾Ò´ÂÁö¸¦ ¸»ÇØÁà.
Write the subtraction sentence.
»¬¼À½ÄÀ» ½á º¸ÀÚ.
¢Ä Think more.... ¢Å
¹®Á¦ÀÇ Áß°£Áß°£ °¨ÃÊ°°Àº ¿ªÇÒÀ» ÇÏ´Â ¹®Á¦µéÀÌ º¸ÀÔ´Ï´Ù.
Çѹø ´õ »ý°¢ÇØ º¸ÀÚ´Â Àǵµ Àεí ÇÕ´Ï´Ù.
¢Ä Cross word Puzzle¢Å
µ¡¼À½Ä°ú »¬¼À½Ä¿¡¼ µîÀåÇÑ ´Ü¾îµé·Î ÆÛÁñÀ» ¸¸µé¾î º¸¾Ò¾î¿ä.
Plus sign | The symbol for addition |
add | Put groups together |
sum | The answer to an addition problem |
zero | None |
subtract | To take away to find out how many are left |
minus sign | The symbol for subtraction |
difference | The answer to a subtraction problem |
¢Ä Think of stories¢Å
Problem solving ÀÇ ¿ªÀ¸·Î ¼ýÀÚ½ÄÀ¸·Î ¹®Á¦ ¸¸µé¾î ³»±â¸¦ ½ÃµµÇØ º¾´Ï´Ù.
Áؼ°¡ ÇØ ³õÀº À̾߱â...
¼öÇпë¾îÄ«µå¨ë<-- Ŭ¸¯
¼öÇпë¾îÄ«µå¨ì<--Ŭ¸¯