问题 解答题
下面各题怎样算简便就怎样算.
2000-586-11455×25+25×45(25+125)×8198×47
540÷12÷577×13-13×27104×3299×79+79.
答案

解(1)2000-586-114

=2000-(586+114)

=2000-700

=1300

(2)55×25+25×45

=25×(55+45)

=25×100

=2500

(3)(25+125)×8

=25×8+125×8

=200+1000

=1200

(4)198×47

=(200-2)×47

=200×47-2×47

=9400-94

=9306

(5)540÷12÷5

=540÷(12×5)

=540÷60

=9

(6)77×13-13×27

=13×(77-27)

=13×50

=650

(7)104×32

=(100+4)×32

=100×32+4×32

=3200+128

=3328

(8)99×79+79

=79×(99+1)

=79×100

=7900

问答题 简答题
问答题 简答题