![]() | ![]() | ![]() |
![]() | ![]() | 25 ×4 |
×101-![]() | ×101 | ( - )×60 |
=
;(2)
-
,=
(1
),=
1,=
;(3)15×(
),=15×
+15×
,=10+9,
=19;
(4)
(25×51),=(
51)×25,=12×25,
=300;
(5)
+
,=
(
),=
1,=
;(6)25
×4,=25×4+
4,=100+3,
=103;
(7)
×101-
,=
(101-1),=
100,=70;
(8)
×101,=
×100+
×1,=63+
,=63.63;
(9)(
-
)×60,=
×60-
×60,=35-12,
=24.
分析:(1)依据分数乘法计算方法即可解答,
(2)(3)(5)(6)(7)(8)(9)运用乘法分配律解答,
(4)运用乘法结合律解答.
点评:(1)依据四则运算顺序正确进行计算,(2)正确运用四则运算计算方法解决问题,是本题考查知识点..



