分析:(1)把0.888×125化成0.111×(8×125),再運(yùn)用乘法的分配律進(jìn)行簡算,
(2)原式化成
567+345×(567-1) |
567×345+222 |
,再運(yùn)用乘法的分配律進(jìn)行簡算,
(3)把除以化成乘以,再運(yùn)用乘法的分配律進(jìn)行簡算,
(4)原式化成1+
+
+…+
=2×(1
-+
-+-
+…+
-
),再進(jìn)行簡算.
解答:解:(1)0.888×125×73+999×3,
=0.111×(8×125)×73+111×(9×3),
=0.111×1000×73+111×27,
=111×73+111×27,
=111×(73+27),
=111×100,
=11100;
(2)
,
=
567+345×(567-1) |
567×345+222 |
,
=
567+345×567-345 |
567×345+222 |
,
=
,
=1;
(3)4.44
÷4+÷+×4,
=4
×
+
×4
+
×4
,
=4
×(
+
+
),
=4
×
,
=9;
(4)1
+++…+,
=1+
+
+…+
,
=2×(1
-+
-+-
+…+
-
),
=2×(1-
),
=2×
,
=
.
點(diǎn)評:本題考查了分?jǐn)?shù)、小數(shù)四則混合運(yùn)算的定律,注意算式的特點(diǎn),靈活運(yùn)用運(yùn)算定律進(jìn)行簡算.