如题所述
第1个回答 2022-06-23
4.2÷12.5÷0.8×101
=4.2÷(12.5×0.8)×101
=4.2÷10×101
=0.42×100+0.42×1
=42+0.42
=42.42本回答被网友采纳
=4.2÷(12.5×0.8)×101
=4.2÷10×101
=0.42×100+0.42×1
=42+0.42
=42.42本回答被网友采纳
第2个回答 2022-06-24
4.2÷1×101
=4.2×100+4.2×1
=420+4.2
=424.2
=4.2×100+4.2×1
=420+4.2
=424.2