问题 解答题
递等式计算.(能简算的要简算)
①2.5×3.2×1.25
②6.06-3.5×0.24
③60.4-(10+9.6÷0.4)④2.3×3.2+2.3×6.8.
答案

①2.5×3.2×1.25,

=2.5×4×0.8×1.25,

=(2.5×4)×(0.8×1.25),

=10×1,

=10;

②6.06-3.5×0.24,

=6.06-0.84,

=5.22;

③60.4-(10+9.6÷0.4),

=60.4-(10+24),

=60.4-34,

=36.4;

④2.3×3.2+2.3×6.8,

=2.3×(3.2+6.8),

=2.3×10,

=23.

填空题
单项选择题