第 1 單元，第 1 課
Numerical Expressions數值算式
點卡片翻面。
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- numerical expression數值算式\(18 - 4 \times 3\) is a numerical expression.
- evaluate求值Evaluate \(2 + 3 \times 5\) to get \(17\).
- operation運算Addition and multiplication are operations.
- power次方\(2^3\) is a power with value \(8\).
- base底數In \(7^2\), the base is \(7\).
- exponent指數In \(7^2\), the exponent is \(2\).
- order of operations運算順序By the order of operations, multiply before you add.
- grouping symbols分組符號Parentheses and brackets are grouping symbols.
- fraction bar分數線The fraction bar in \(\frac{8 + 4}{3}\) groups \(8 + 4\).
這課的重點字
- numerical expression數值算式
- evaluate求值
- operation運算
- power次方
- base底數
- exponent指數
- order of operations運算順序
- grouping symbols分組符號