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请用简便方法计算下面各题486+65+105+14329-142-58156+77+123-56876-(676+48)500-202639-(65+339)7200÷25÷4125×(20+8)5×(4×27)125×27×8×226×46+54×26125×3232×55+32×44+3232×10232×101-3226×187-87×2632×98263-72-28+17
题目详情
请用简便方法计算下面各题
486+65+105+14 | 329-142-58 | 156+77+123-56 | 876-(676+48) |
500-202 | 639-(65+339) | 7200÷25÷4 | 125×(20+8) |
5×(4×27) | 125×27×8×2 | 26×46+54×26 | 125×32 |
32×55+32×44+32 | 32×102 | 32×101-32 | 26×187-87×26 |
32×98 | 263-72-28+17 |
▼优质解答
答案和解析
(1)486+65+105+14
=(486+14)+(65+105)
=500+170
=670;
(2)329-142-58
=329-(142+58)
=329-200
=129;
(3)156+77+123-56
=(156-56)+(77+123)
=100+200
=300;
(4)876-(676+48)
=876-676-48
=200-48
=152;
(5)500-202
=500-200-2
=300-2
=298;
(6)639-(65+339)
=639-339-65
=300-65
=235;
(7)7200÷25÷4
=7200÷(25×4)
=7200÷100
=72;
(8)125×(20+8)
=125×20+125×8
=2500+1000
=3500;
(9)5×(4×27)
=5×4×27
=20×27
=540;
(10)125×27×8×2
=(125×8)×(27×2)
=1000×54
=54000;
(11)26×46+54×26
=26×(46+54)
=26×100
=2600;
(12)125×32
=125×(8×4)
=125×8×4
=1000×4
=4000;
(13)32×55+32×44+32
=32×(55+44+1)
=32×100
=3200;
(14)32×102
=32×(100+2)
=32×100+32×2
=3200+64
=3264;
(15)32×101-32
=32×(101-1)
=32×100
=3200;
(16)26×187-87×26
=26×(187-87)
=26×100
=2600;
(17)32×98
=32×(100-2)
=32×100-32×2
=3200-64
=3136;
(18)263-72-28+17
=(263+17)-(72+28)
=280-100
=180.
=(486+14)+(65+105)
=500+170
=670;
(2)329-142-58
=329-(142+58)
=329-200
=129;
(3)156+77+123-56
=(156-56)+(77+123)
=100+200
=300;
(4)876-(676+48)
=876-676-48
=200-48
=152;
(5)500-202
=500-200-2
=300-2
=298;
(6)639-(65+339)
=639-339-65
=300-65
=235;
(7)7200÷25÷4
=7200÷(25×4)
=7200÷100
=72;
(8)125×(20+8)
=125×20+125×8
=2500+1000
=3500;
(9)5×(4×27)
=5×4×27
=20×27
=540;
(10)125×27×8×2
=(125×8)×(27×2)
=1000×54
=54000;
(11)26×46+54×26
=26×(46+54)
=26×100
=2600;
(12)125×32
=125×(8×4)
=125×8×4
=1000×4
=4000;
(13)32×55+32×44+32
=32×(55+44+1)
=32×100
=3200;
(14)32×102
=32×(100+2)
=32×100+32×2
=3200+64
=3264;
(15)32×101-32
=32×(101-1)
=32×100
=3200;
(16)26×187-87×26
=26×(187-87)
=26×100
=2600;
(17)32×98
=32×(100-2)
=32×100-32×2
=3200-64
=3136;
(18)263-72-28+17
=(263+17)-(72+28)
=280-100
=180.
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