【要点】
例1. (1) 正の数を何回かけても符号は正になる. (2) 負の数を偶数回かけると符号は正になり, 負の数を奇数回かけると符号は負になる. 2. 23 の 3 の部分を「指数」という. (1) 指数による計算は,「符号を付けること」や「かけ算」などよりも優先して行う. (2) 指数よりも先に計算するときは「かっこ」を付ける. 3. 1.(2)から (負の数)偶数 は正の数になる.(負の数)奇数 は負の数になる. 1.
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問題 次の計算をしなさい.(答は解答欄から選びなさい.)
○START (2回目からはNEXT)を押すと1問表示されます.(分からないときはHELPを押す.)
○全部で10問あります. ○全問正解すれば金魚がささやかなショーを行います. [第 問/全10問中]
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