第1个回答 2014-10-26
(1)180+274+126+120
=(180+120)+(274+126)
=300+400
=700
(2)125×6×50×8
=(125×8)×(6×50)
=1000×300
=300000
(3)184-35-65
=184-(35+65)
=184-100
=84
(4)135×37+65×37
=37×(135+65)
=37×200
=7400
(5)101×798-798
=798×(101-1)
=798×100
=79800
(6)104×25
=(100+4)×25
=100×25+4×25
=2500+100
=2600
(7)700÷25÷4
=700÷(25×4)
=700÷100
=7
(8)(180+80)×25
=180×25+80×25
=4×25×45+2000
=4500+2000
=6500
(9)25×32
=25×4×8
=100×8
=800
(10)700÷25×4
=700÷(25×4)×16
=700÷100×16
=7×16
=112
(11)1700÷(25×17)
=1700÷17÷25
=100÷25
=4
第2个回答 2014-10-26
(1)180+274+126+120
=(180+120)+(274+126)
=300+400
=700
(2)125×6×50×8
=(125×8)×(6×50)
=1000×300
=300000
(3)184-35-65
=184-(35+65)
=184-100
=84
(4)135×37+65×37
=37×(135+65)
=37×200
=7400
(5)101×798-798
=798×(101-1)
=798×100
=79800
(6)104×25
=(100+4)×25
=100×25+4×25
=2500+100
=2600
(7)700÷25÷4
=700÷(25×4)
=700÷100
=7
(8)(180+80)×25
=180×25+80×25
=4×25×45+2000
=4500+2000
=6500
(9)25×32
=25×4×8
=100×8
=800
(10)700÷25×4
=700÷(25×4)×16
=700÷100×16
=7×16
=112
(11)1700÷(25×17)
=1700÷17÷25
=100÷25
=4