问题
解答题
计算: 2÷
2.25×1.8+17.5×0.18; 30×(
|
答案
(1)2÷
×8 5 25 24
=2×
×5 8 25 24
=125 96
(2)2.25×1.8+17.5×0.18
=2.25×1.8+1.75×1.8
=(2.25+1.75)×1.8
=4×1.8
=7.2
(3)30×(
+2 5
-1 6
)4 15
=30×
+30×2 5
-30×1 6 4 15
=12+5-8
=9