Physics
Senior High
①12.3+4.56=16.89 ≒ 16.9
②3456−4.32=3451.68 ≒ 3.452×10³
①は累乗の形にしないのに、②は累乗の形を使わなければいけない理由を教えて下さい!🥺💦
①は、16.9→1.69×10にしないといけないと思うのですが……。。。
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