问题 解答题
能简算的要简算.
0.25×4.78×4
1.5×105
32×1.25×2.55.5×2.3+1.7×5.5.
答案

①0.25×4.87×4,

=(0.25×4)×4.87,

=1×4.87,

=4.87,

②1.5×105,

=1.5×(100+5),

=1.5×100+1.5×5,

=150+7.5,

=157.5,

③32×1.25×2.5,

=8×4×1.25×2.5,

=(1.25×8)×(4×2.5),

=10×10,

=100,

④5.5×2.3+1.7×5.5,

=(1.7+3.3)×5.5,

=5×5.5,

=27.5.

问答题
填空题