The Four Operations
Akopọ
Addition, subtraction, multiplication and division are the four operations every other piece of mathematics is built on. The skill that matters at IGCSE is not just doing each one, but doing them in the right order and handling negatives, fractions and decimals without slips.
In this lesson you will work through the order of operations (BIDMAS), calculate confidently with negative numbers, and add, subtract, multiply and divide fractions and decimals. Getting these foundations automatic frees up your attention for the harder ideas later in the course.
Awọn Afojusun
- Use the four operations for calculations with integers, fractions and decimals, including correct ordering of operations and use of brackets.
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Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
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- Work out 5 + 2 x 3^2. A. 23 B. 63 C. 21 D. 19 Answer: A
- Work out 3 - (-5). A. -8 B. -2 C. 2 D. 8 Answer: D
- Work out (-4) x (-3). A. -12 B. -7 C. 7 D. 12 Answer: D
- Work out 2/3 + 1/4. A. 3/7 B. 11/12 C. 2/12 D. 3/12 Answer: B
- Work out 3/5 ÷ 2/7. A. 6/35 B. 5/12 C. 21/10 D. 10/21 Answer: C
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Awọn Iwe Itọsọna Ti a Gba Nimọran
Ẹ̀kọ́ síwájú láti àwọn orísun ṣíṣí
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Abala ìwé ẹ̀kọ́
Fractions
Simplify fractions
"Intermediate Algebra: Fractions" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/intermediate-algebra/pages/1-3-fractions. Access for free at https://openstax.org/books/intermediate-algebra/pages/1-introduction
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Abala ìwé ẹ̀kọ́
Decimals and Fractions
Convert fractions to decimals
"Prealgebra: Decimals and Fractions" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/prealgebra/pages/5-3-decimals-and-fractions. Access for free at https://openstax.org/books/prealgebra/pages/1-introduction
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