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1 用竖式计算。
0.32×0.3=
0.52×0.03=
0.32×0.3=
0.52×0.03=
答案
0.096 0.0156(竖式略)
用竖式计算。
1.35×0.6=
3.6×80=
1.35×0.6=
3.6×80=
答案
0.81 288(竖式略)
用简便方法计算。
7.5×10.1
6.2×8.5−6.2×7.5
7.5×10.1
6.2×8.5−6.2×7.5
答案
$\begin{aligned}&\ \ 7.5×10.1\\=&7.5×(10+0.1)\\=&7.5×10+7.5×0.1\\=&75+0.75\\=&75.75\end{aligned}$
$\begin{aligned}&\ \ 6.2×8.5-6.2×7.5\\=&6.2×(8.5-7.5)\\=&6.2×1\\=&6.2\end{aligned}$
$\begin{aligned}&\ \ 6.2×8.5-6.2×7.5\\=&6.2×(8.5-7.5)\\=&6.2×1\\=&6.2\end{aligned}$
计算$:0.\underbrace{00······00}_{2024个0}25×0.\underbrace{00······00}_{2025个0}37$。
答案
$0.\underbrace{00······00}_{4050个0}925$
