问题
解答题
脱式计算.(能简算的要简算)
17.68÷5.2+3.4
30.6×1.5÷5.1
3.2×2.08-0.6
3.8÷2.5÷4.
答案
(1)17.68÷5.2+3.4
=3.4+3.4,
=6.8;
(2)30.6×1.5÷5.1,
=30.6÷5.1×1.5,
=6×1.5,
=9;
(3)3.2×2.08-0.6,
=6.656-0.6,
=6.056;
(4)3.8÷2.5÷4,
=3.8÷(2.5×4),
=3.8÷10,
=0.38.