问题 解答题
用简便方法计算:
①9.6×10.1=②12.5×3.7×0.8=③1.2×2.5+0.8×2.5=
④4.8×0.25=⑤99×0.6=⑥2.6×1.25-1.6×1.25=
答案

①9.6×10.1,

=9.6×(10+0.1),

=9.6×10+9.6×0.1,

=96+0.96,

=96.96;

②12.5×3.7×0.8,

=12.5×0.8×3.7,

=10×3.7,

=37;

③1.2×2.5+0.8×2.5,

=(1.2+0.8)×2.5,

=2×2.5,

=5;

④4.8×0.25,

=1.2×4×0.25,

=1.2×(4×0.25),

=1.2×1,

=1.2;

⑤99×0.6,

=(100-1)×0.6,

=100×0.6-0.6,

=60-0.6,

=59.4;

⑥2.6×1.25-1.6×1.25,

=(2.6-1.6)×1.25,

=1×1.25,

=1.25.

填空题
填空题