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简便计算:45+55X235400除18X69000除7242000除12除7除25除5除4(91X27X84X76)除(9X7X19X13)
题目详情
简便计算:45+55X23 5400除18X6 9000除72 42000除12除7除25除5除4 (91X27X84X76)除(9X7X19X13)
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答案和解析
45+55X23
=100-55+55*23
=100+55*(23-1)
=100+1210
=1310
5400除18X6
=300/6
=50
9000除72
=9000/9/8
=1000/8
=125
42000除12除7除25除5除4
=42000/(25*4*12*5*7)
=42000/42000
=1
(91X27X84X76)除(9X7X19X13)
=91/13*27/9*84/7*76/19
=7*3*12*4
=1008
=100-55+55*23
=100+55*(23-1)
=100+1210
=1310
5400除18X6
=300/6
=50
9000除72
=9000/9/8
=1000/8
=125
42000除12除7除25除5除4
=42000/(25*4*12*5*7)
=42000/42000
=1
(91X27X84X76)除(9X7X19X13)
=91/13*27/9*84/7*76/19
=7*3*12*4
=1008
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