考點:小數(shù)四則混合運算
專題:運算順序及法則
分析:(1)根據(jù)乘法結(jié)合律進行簡算;
(2)根據(jù)乘法交換律進行簡算;
(3)根據(jù)乘法分配律進行簡算;
(4)根據(jù)乘法分配律進行簡算;
(5)根據(jù)乘法分配律進行簡算;
(6)根據(jù)減法的性質(zhì)進行簡算.
解答:
解:(1)0.125×32
=0.125×(8×4)
=(0.125×8)×4
=1×4
=4;
(2)1.25×213×0.8
=1.25×0.8×213
=1×213
=213;
(3)3.26×5.7-3.26×0.7
=3.26×(5.7-0.7)
=3.26×5
=16.3;
(4)56.5×99+56.5
=56.5×(99+1)
=56.5×100
=5650;
(5)0.78×101
=0.78×(100+1)
=0.78×100+0.78×1
=78+0.78
=78.78;
(6)19.625-(4.716+9.625)
=19.625-4.716-9.625
=19.625-9.625-4.716
=10-4.716
=5.284.
點評:考查了運算定律與簡便運算,四則混合運算.注意運算順序和運算法則,靈活運用所學的運算定律簡便計算.