考點:小數(shù)四則混合運算,運算定律與簡便運算
專題:運算順序及法則,運算定律及簡算
分析:(1)把10.1化為10+0.1,再運用乘法分配律計算即可;
(2)把88化為8×11,再先算8×0.25,得到22×99,再化為22×(100-1)再相乘即可;
(3)利用乘法分配律把原式化為3.8×(5.6+4.4)計算即可;
(4)從左到右依次算即可;
(5)根據(jù)乘法分配律計算即可.
解答:
解:(1)5.2×10.1
=5.2×(10+0.1)
=5.2×10+5.2×0.1
=52+0.52
=52.52;
(2)88×0.25×9×11
=8×11×0.25×9×11
=(8×0.25)×11×9×11
=2×11×9×11
=22×99
=22×(100-1)
=22×100-22×1
=2200-22
=2178;
(3)3.8×5.6+4.4×3.8
=3.8×(5.6+4.4)
=3.8×10
=38;
(4)10÷0.2÷2.5
=50÷2.5
=20;
(5)3.52×2.8-1.8×3.52
=3.52×(2.8-1.8)
=3.52×1
=3.52.
點評:完成本題要注意分析式中數(shù)據(jù),運用合適的簡便方法計算.