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用简便方法计算:146+58+5488×12514×99+14529+64-297200÷25÷4258-72-2825×17×417×23-23×7
题目详情
用简便方法计算: 146+58+54 | 88×125 | 14×99+14 | 529+64-29 |
7200÷25÷4 | 258-72-28 | 25×17×4 | 17×23-23×7 |
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答案和解析
(1)146+58+54
=146+54+58
=200+58
=258
(2)88×125
=11×8×125
=11×(8×125)
=11×1000
=11000
(3)14×99+14
=14×(99+1)
=14×100
=1400
(4)529+64-29
=529-29+64
=500+64
=564
(5)7200÷25÷4
=7200÷(25×4)
=7200÷100
=72
(6)258-72-28
=258-(72+28)
=258-100
=158
(7)25×17×4
=25×4×17
=100×17
=1700
(8)17×23-23×7
=23×(17-7)
=23×10
=230
=146+54+58
=200+58
=258
(2)88×125
=11×8×125
=11×(8×125)
=11×1000
=11000
(3)14×99+14
=14×(99+1)
=14×100
=1400
(4)529+64-29
=529-29+64
=500+64
=564
(5)7200÷25÷4
=7200÷(25×4)
=7200÷100
=72
(6)258-72-28
=258-(72+28)
=258-100
=158
(7)25×17×4
=25×4×17
=100×17
=1700
(8)17×23-23×7
=23×(17-7)
=23×10
=230
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