請用簡便方法進(jìn)行計(jì)算.
0.78×101                        
1.96×99
36.4×4.6+36.4×5.4 100.1×101-100.1
分析:(1)可將101拆分為100+1后,根據(jù)乘法分配律計(jì)算;
(2)可將99變?yōu)?00-1后,根據(jù)乘法分配律計(jì)算;
(3)(4)可根據(jù)乘法分配律計(jì)算.
解答:解:(1)0.78×101
=0.78×(100+1)
=0.78×100+0.78×1
=78+0.78
=78.78;

(2)1.96×99
=1.96×(100-1)
=1.96×100-1.96×1
=196-1.96
=194.04;

(3)36.4×4.6+36.4×5.4
=(4.6+5.4)×36.4
=10×36.4
=364;

(4)100.1×101-100.1
=100.1×(100-1)
=100.1×100
=10010.
點(diǎn)評:完成此類題目要注意分析式中數(shù)據(jù)的特點(diǎn),然后運(yùn)用合適的方法計(jì)算.
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