问题 解答题
用简便方法计算下面各题:
713-(387+313)
866-370-130399-195
400-199807-401397-196
369-(246+69)594-300973×5×2
125×897×8108×7599×83
7×75-7×2588×27+27×12400÷25
25×36103×2776×102
3600÷25÷499×35(25+12)×4
56×27+27×4456×99+5625×32×125
125×649000÷125÷8.
答案

(1)713-(387+313)

=713-387-313

=713-313-387

=400-387

=13

(2)866-370-130

=866-(370+130)

=866-500

=366

(3)400-199

=400-200+1

=200+1

=201

(4)807-401

=800+7-400-1

=800+400+7-1

=1206

(5)369-(246+69)

=369-69-246

=300-246

=54

(6)594-300=294

(7)125×897×8

=125×8×897

=1000×897

=897000

(8)108×75

=(100+8)×75

=100×75+8×75

=7500+600

=8100

(9)7×75-7×25

=7×(75-25)

=7×50

=350

(10)88×27+27×12

=(88+12)×27

=100×27

=2700

(11)25×36

=25×4×9

=100×9

=900

(12)103×27

=(100+3)×27

=100×27+3×27

=2700+91

=2791

(13)3600÷25÷4

=3600÷(25×4)

=3600÷100

=36

(14)99×35

=(100-1)×35

=100×35-35

=3500-35

=3465

(15)56×27+27×44

=(56+44)×27

=100×27

=2700

(16)56×99+56

=(99+1)×56

=100×56

=5600

(17)125×64

=125×8×8

=1000×8

=8000

(18)9000÷125÷8

=9000÷(125×8)

=9000÷1000

=9

单项选择题
单项选择题