Structure And Calculation
Resumen
Every other topic in this course is standing on this one. Solve a quadratic and you are factorising; find the area of a circle and you are rounding; work with a bearing and you are reading a calculator display correctly. The eleven specification references gathered here, N1 to N11, are the machinery the rest of the subject runs on, and a candidate who is shaky on any of them will lose marks in questions that look nothing like arithmetic.
You will order numbers and use the six comparison symbols precisely; apply the four operations to negatives, decimals and mixed numbers; break a number into its prime factors and use that to find a highest common factor in seconds; handle powers, roots and index laws; write and read standard form; use set notation and Venn diagrams; round sensibly and estimate quickly; and, on the Extension Tier, work exactly with surds, rationalise a denominator and calculate with upper and lower bounds. The single most profitable habit in this topic is refusing to round until the very last line.
Objetivos
- [Core] order positive and negative integers, decimals and fractions
- [Core] use the symbols =, ≠, <, >, ≤, ≥ (Notes: including use of a number line)
- [Core] apply the four operations, including formal written methods, to integers, decimals and simple fractions (proper and improper), and mixed numbers - all both positive and negative
- [Core] understand and use place value (eg when working with very large or very small numbers, and when calculating with decimals) (Notes: including questions set in context)
- [Core] recognise and use relationships between operations, including inverse operations (eg cancellation to simplify calculations and expressions)
- [Core] use conventional notation for priority of operations, including brackets, powers, roots and reciprocals
- [Core] use the concepts and vocabulary of even, odd and prime numbers, factors (divisors), multiples, common factors, common multiples, highest common factor, lowest common multiple, prime factorisation, including using product notation (Notes: prime factor decomposition including product of prime factor written in index form)
- [Core] use positive integer powers and associated real roots (square, cube and higher), recognise powers of 2, 3, 4, 5
- [Core] index laws for multiplication and division using integer powers
- [Extension] including fractional powers
- [Core] calculate exactly with fractions
- [Extension] calculate exactly with surds
- [Extension] manipulation and simplification of surds including rationalising a denominator
- [Core] calculate with and interpret standard form A × 10ⁿ, where 1 ≤ A < 10 and n is an integer (Notes: interpret calculator displays)
- [Core] use language and notation of sets including n(A), A′, A ∩ B, A ∪ B, ξ
- [Core] understand and use Venn diagrams to solve problems
- [Core] use calculators effectively and efficiently including trigonometrical functions
- [Core] round numbers and measures to an appropriate degree of accuracy (eg to a specified number of decimal places or significant figures)
- [Core] apply and interpret limits of accuracy
- [Core] use estimation to work out approximate answers to calculations
- [Extension] calculate and use upper and lower bounds
Mapa mental
Este tema esta esquematizado para ver como se conectan las ideas.
Abre el mapa mental en la app
Nota de la lección
Apunte completo disponible en la aplicacion Green Bridge
Instala la aplicacion Green Bridge CBT en tu movil u ordenador para acceder a toda la biblioteca IGCSE: examenes anteriores, criterios de correccion, mapas mentales, tarjetas de estudio y lecciones en audio.
Evaluación de la lección
Felicitaciones por completar la lección del Structure And Calculation. Ahora que has explorado el conceptos e ideas clave, es hora de poner a prueba tus conocimientos. Esta sección ofrece una variedad de prácticas Preguntas diseñadas para reforzar su comprensión y ayudarle a evaluar su comprensión del material.
Te encontrarás con una variedad de tipos de preguntas, incluyendo preguntas de opción múltiple, preguntas de respuesta corta y preguntas de ensayo. Cada pregunta está cuidadosamente diseñada para evaluar diferentes aspectos de tu conocimiento y habilidades de pensamiento crítico.
Utiliza esta sección de evaluación como una oportunidad para reforzar tu comprensión del tema e identificar cualquier área en la que puedas necesitar un estudio adicional. No te desanimes por los desafíos que encuentres; en su lugar, míralos como oportunidades para el crecimiento y la mejora.
- Which of these numbers is the smallest? A. -8 B. -3 C. 0.65 D. 0.7 Answer: A
- 672 = 2^5 x 3 x 7 and 252 = 2^2 x 3^2 x 7. What is the highest common factor of 672 and 252? A. 21 B. 84 C. 168 D. 2016 Answer: B
- Write 2 500 000 in standard form. A. 25 x 10^5 B. 2.5 x 10^5 C. 2.5 x 10^6 D. 0.25 x 10^7 Answer: C
- Work out 24 divided by 6 multiplied by 2. A. 2 B. 8 C. 12 D. 288 Answer: B
- A length is 24 cm to the nearest centimetre. Which statement is correct? A. The length is between 23 cm and 25 cm inclusive B. The length is at least 23.5 cm and less than 24.5 cm C. The length is greater than 23.5 cm and at most 24.5 cm D. The length is exactly 24 cm Answer: B
Resuelve estas preguntas en la aplicacion
Resuelve estas preguntas en la aplicacion
Libros Recomendados
Practica preguntas simuladas
¿Quieres practicar preguntas simuladas sobre Structure And Calculation? Descarga la aplicación Green Bridge CBT para acceder a preguntas simuladas y evaluaciones completas sobre este tema.
Descarga la aplicación en Google Playstore.
Todo lo que necesitas para destacar en JAMB, WAEC y NECO.
