问题
解答题
用自己喜欢的方式计算
①2.5×3.8×4
1.23×7.2+1.23×2.8
137÷4÷2.5
0.72+4.8÷0.16.
答案
(1)2.5×3.8×4,
=(2.5×4)×3.8,
=10×3.8,
=38;
(2)1.23×7.2+1.23×2.8,
=1.23×(7.2+2.8),
=1.23×10,
=12.3;
(3)137÷4÷2.5,
=137÷(4×2.5),
=137÷10,
=13.7;
(4)0.72+4.8÷0.16,
=0.72+30,
=30.72.