问题
解答题
计算,能简算的要简算
|
答案
(1)4%×99+0.04,
=0.04×99+0.04,
=0.04×(99+1),
=0.04×100,
=4;
(2)75%×25+175×
,3 4
=
×25+175×3 4
,3 4
=
×(25+175),3 4
=
×200,3 4
=150;
(3)(
+3 8
)×40,7 10
=
×40+3 8
×40,7 10
=15+28,
=43.