问题
解答题
脱式计算,能用简便方法计算用简便方法.
6.4×4.5+3.6×4.5
16.38÷0.36-4.8
0.85+0.2×1.35
4.38÷0.125÷0.8.
答案
(1)6.4×4.5+3.6×4.5
=(6.4+3.6)×4.5
=10×4.5
=45;
(2)16.38÷0.36-4.8
=45.5-4.8
=40.7;
(3)0.85+0.2×1.35
=0.85+0.27
=1.12;
(4)4.38÷0.125÷0.8
=4.38÷(0.125×8)
=4.38÷1
=4.38.