求以下算式的简便方法
834+129+166719-458+281637-135-65-2371800÷25÷472×12583×102199×99+199420÷28125×2×865×32...
834+129+166 719-458+281 637-135-65-237
1800÷25÷4 72×125 83×102
199×99+199 420÷28 125×2×8
65 ×32+65×68 44×25 101×73-73 展开
1800÷25÷4 72×125 83×102
199×99+199 420÷28 125×2×8
65 ×32+65×68 44×25 101×73-73 展开
展开全部
834+129+166
=834+166+129
=1000+129
=1129
719-458+281
=719+281-458
=1000-458
=542
637-135-65-237
=637-237-(135+65)
=400-200
=200
1800÷25÷4
=1800÷(25×4)
=1800÷100
=18
72×125
=9 ×(8×125)
=9×1000
=9000
83×102
=83×(100+2)
=83×100+83×2
=8300+166
=8466
199×99+199
=199×(1+99)
=199×100
=1900
420÷28
=420÷7÷4
=60÷4
=15
125×2×8
=125×8×2
=1000×2
=2000
65×32+65×68
=65×( 32+68)
=65×100
=6500
44×25
=11×(4×25)
=11×100
=1100
101×73-73
=73×(101-1)
=73×100
=7300
=834+166+129
=1000+129
=1129
719-458+281
=719+281-458
=1000-458
=542
637-135-65-237
=637-237-(135+65)
=400-200
=200
1800÷25÷4
=1800÷(25×4)
=1800÷100
=18
72×125
=9 ×(8×125)
=9×1000
=9000
83×102
=83×(100+2)
=83×100+83×2
=8300+166
=8466
199×99+199
=199×(1+99)
=199×100
=1900
420÷28
=420÷7÷4
=60÷4
=15
125×2×8
=125×8×2
=1000×2
=2000
65×32+65×68
=65×( 32+68)
=65×100
=6500
44×25
=11×(4×25)
=11×100
=1100
101×73-73
=73×(101-1)
=73×100
=7300
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