题目内容
【题目】计算:1.222×9-1.332×4=________.
【答案】6.32
【解析】原式=(1.22×3)2-(1.33×2)2
=3.662-2.662
=(3.66+2.66)(3.66-2.66)
=6.32.
故答案是:6.32.
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题目内容
【题目】计算:1.222×9-1.332×4=________.
【答案】6.32
【解析】原式=(1.22×3)2-(1.33×2)2
=3.662-2.662
=(3.66+2.66)(3.66-2.66)
=6.32.
故答案是:6.32.