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Find x =? # equation # m1 # exam tomorrow

+ and - are opposite polar signs.

On the left side is +, so move to the right side. Must be -

Keep it repeating as basic maths. 😎

2025/11/14 Edited to

... Read moreช่วงก่อนสอบเรามักเจอโจทย์หา x ที่หน้าตาคล้ายๆ กัน เช่น x+4=5 หรือ x÷4=5 หลักที่ฉันใช้ตลอดคือ “ทำให้เหลือ x ตัวเดียว” โดยใช้การทำ “ตรงข้าม” กับสิ่งที่ติดอยู่กับ x 1) ตัวอย่างแบบบวก: x+4=5 สิ่งที่ติดกับ x คือ +4 ดังนั้นเราทำตรงข้ามคือ -4 ทั้งสองข้าง x+4-4 = 5-4 สรุป: x = 1 ทริคจำง่าย: บวกอยู่ฝั่งซ้าย ย้ายไปขวาให้ลบ (หรือพูดให้ชัดคือ ลบ 4 ทั้งสองข้าง) 2) ตัวอย่างแบบหาร: x÷4=5 (หรือ x/4=5) สิ่งที่เกิดกับ x คือ “หาร 4” ดังนั้นทำตรงข้ามคือ “คูณ 4” ทั้งสองข้าง x/4 ×4 = 5×4 สรุป: x = 20 ทริคจำง่าย: หารอยู่กับ x ให้คูณกลับ 3) เช็กคำตอบเร็วๆ (สำคัญมากก่อนส่ง) - ถ้าได้ x=1 จากข้อ x+4=5 ให้แทนกลับ: 1+4=5 ถูก - ถ้าได้ x=20 จากข้อ x÷4=5 ให้แทนกลับ: 20÷4=5 ถูก การแทนกลับช่วยกันพลาดเรื่องเครื่องหมาย + กับ - หรือคูณ/หารสลับกัน 4) แบบฝึกหัด (ทำเองแล้วตรวจด้วยการแทนค่า) ก) x+7=12 ข) x-9=3 ค) x÷6=4 ง) x×5=35 เฉลยย่อ (ไว้เช็กคำตอบหลังทำ) ก) x=5 ข) x=12 ค) x=24 ง) x=7 ถ้ากำลังหาชุด “แบบฝึกหัด คณิตศาสตร์ ป.1 ฟรี” แนะนำให้เริ่มจากชุดโจทย์บวก-ลบไม่เกิน 20 แล้วค่อยไล่ไปโจทย์หา x แบบง่ายๆ เพราะแนวคิดเดียวกันคือทำให้เหลือสิ่งที่ต้องการ แล้วค่อยตรวจคำตอบด้วยการแทนค่าทุกครั้ง

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The area of a triangle can be found using the inradius. Using Heron’s formula, one can find the length of the circumradius and the inradius using just the side lengths of the triangle. #math #maths #mathematics #geometry #trigonometry
cubicequation

cubicequation

10 likes

4 × cos²(π/9) - √3/2 × csc(π/9) = 1
A proven relation from the regular nonagon. a = side length, b = short diagonal, c = medium diagonal, d = long diagonal & R = circumradius. #math #maths #mathematics #geometry #trigonometry
cubicequation

cubicequation

3 likes

One step closer to scrubs. TEAS exam at ATI: It’s my moment. #TEASExam #TEASPrep #ATIExam #FutureNurse #NursingJourney
Proctored pro

Proctored pro

7 likes

A learning board featuring Sonic the Hedgehog, displaying the alphabet, numbers 1-100, multiplication tables, fractions, parts of speech, synonyms, antonyms, homonyms, decimal place value, MDAS, and algebraic expressions for 'CARTER WEAVER'.
A Dragon Ball Z themed learning board for 'JEREMIAH', showcasing Grade 3 worksheets on order of operations, fractions, counting money, a U.S.A. map, geometry, and math vocabulary like area and perimeter.
A Spider-Man themed learning board for 'MAKAI', featuring 'Words to Know', telling time, multiplication table, Dolch Sight Words, parts of speech, angles, Celsius, friction, and a workbook titled 'Ma'kai's Educational Workbook'.
Learning Boards 📚🧠✏️🖍️
#custom #selflearning #educational #characters #sports
Creative Kids

Creative Kids

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