问题
解答题
能简便就简便 3
10
14.4÷0.6-4.2×3. |
答案
(1)3
×7.4-31 8
+3.6×3.1251 8
=3.125×7.4-3.125+3.6×3.125,
=(7.4+3.6-1)×3.125,
=10×3.125,
=31.25;
(2)10
-(8.8-4 5
)+5 7 2 7
=10.8-8.8+(
+5 7
),2 7
=2+1,
=3;
(3)14.4÷0.6-4.2×3
=24-12.6,
=11.4.