用简便方法计算下面各题.78×36+22×3699×1186×199+86(30+4)×25289×10332×25.
(1)78×36+22×36
=(78+22)×36
=100×36
=3600
(2)99×11
=(100-1)×11
=11×100-11
=1100-11
=1089
(3)86×199+86
=86×(199+1)
=86×200
=17200
(4)(30+4)×25
=30×25+4×25
=750+100
=850
(5)289×103
=289×(100+3)
=289×100+289×3
=28900+867
=29767
(6)32×25
=8×(4×25)
=8×100
=800
=(78+22)×36
=100×36
=3600
(2)99×11
=(100-1)×11
=11×100-11
=1100-11
=1089
(3)86×199+86
=86×(199+1)
=86×200
=17200
(4)(30+4)×25
=30×25+4×25
=750+100
=850
(5)289×103
=289×(100+3)
=289×100+289×3
=28900+867
=29767
(6)32×25
=8×(4×25)
=8×100
=800
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