" Subtracting 1 from a number takes you backwards 1 number. For example, 4 - 1 = 3. For instance, you add the doubles 5 + 5 to get 10. Just write the equation backward to get 10 - 5 = 5.  If 5 + 5 = 10, then 10 - 5 = 5. If 2 + 2 = 4, then 4 - 2 = 2. For example:  3 + 1 = 4 1 + 3 = 4 4 - 1 = 3 4 - 3 = 1 For example, ___ + 1 = 6 (the answer is 5). This also sets the foundation for algebra and beyond.  Subtract the numbers in the 1s column and bring down the number in the 10s column. 32 = 3 10s and 2 1s. 64 = 6 10s and 4 1s. 96 = __ 10s and __ 1s. You want to subtract 42 - 37. You start by trying to subtract 2 - 7 in the 1s column. However, that doesn't work! Borrow 10 from the 10s column and put it into the 1s column. Instead of 4 10s, you now have 3 10s. Instead of 2 1s, you now have 12 1s. Subtract your 1s column first: 12 - 7 = 5. Then, check the 10s column. Since 3 - 3 = 0, you don't have to write 0. Your answer is 5.
ابدأ بطرح 1. تعلم طرح المثل. احفظ عائلات الأرقام. حل مسائل الفراغات. احفظ نواتج عمليات الطرح حتى 20. تعلم طرح رقم من عدد مكون من رقمين بدون الاستعارة. تدرب على مفهوم مرتبة العدد لكي تتمكن من الطرح بالاستعارة. اطرح باستخدام الاستعارة.