| 6.42×1.01-6.42 | 80.7×8.7+8.07×13 | ×153-0.6×53 |
| 23.19+2.4+2.91+14.6 | 2.6×99+2.6 | 24×( + ) |
![]() | ![]() | . |
=6.42×(1.01-1),
=6.42×0.01,
=0.0642;
(2)80.7×8.7+8.07×13,
=80.7×8.7+80.7×1.3,
=80.7×(8.7+1.3),
=80.7×10,
=807;
(3)
×153-0.6×53,=0.6×(153-53),
=0.6×100,
=60;
(4)23.19+2.4+2.91+14.6,
=(23.19+2.91)+(2.4+14.6),
=26.1+17,
=43.1;
(5)2.6×99+2.6,
=2.6×(99+1),
=2.6×100,
=260;
(6)24×(
+
),=24×
24×
,=9+20,
=29;
(7)(
)×8
,=
8
8
,=5+(
),=5+1,
=6;
(8)
[
×(
)],=
[
],=

,=
3,=
;(9)
,,=
[
-(
)],=
[
],=

,=
.分析:按照小数、分数四则混合运算的运算顺序和小数、分数四则运算的计算法则进行计算,能用简便方法的用简便方法计算.
点评:此题主要考查小数、分数四则混合运算的计算,完成本题要注意分析式中数据,运用合适的简便方法计算.

