简算 简算,全是简算 急急急急急急急急急急急急急急急急急急,,,,快!
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简算急急急急急快点¥~
=(0.25*4)*(1.25*4)*61
=1*5*61
=305
4*98+8.4+8.4
=4*98+8.4*1+8.4*1
=4*(98+1+1)
=4*100
=400
4*1.02
=4*1+4*0.02
=4+0.08
=4.08
3.5/21
=(3.5*2)/(21*2)
=7/42
=1/6
305
408.8
4.08
1/6
简算 简算,全是简算 急急急急急急急急急急急急急急急急急急,,,,快!视频
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(1)1.9+19.9+199.9+1999.9+19999.9
=(2-0.1)+(20-0.1)+(200-0.1)+(2000-0.1)+(20000-0.1)
=(2+20+200+2000+20000)-(0.1×5)
=22222-0.5
=22221.5
(2)99999×77778+33333+66666
=99999×77778+33333+22222×3
=99999×77778+33333×3+22222
=99999×77778+99999+22222
=99999×(77778+22222)
=99999×100000
=9999900000
(4)20082008×2009-20092009×2008
=(10001×2008)×2009-(10001×2009)×2008
=10001×2008×2009-10001×2009×2008
=0-0
=0
(5)1234+2341+3412+4123
=(1000+200+30+4)+(2000+300+40+1)+(3000+400+10+2)+(4000+100+20+3)
=(1000+2000+3000+4000)+(200+300+400+100)+(30+40+10+20)+(4+3+2+1)
=10000+1000+100+10
=11110
=(0.25*4)*(1.25*4)*61
=1*5*61
=305
4*98+8.4+8.4
=4*98+8.4*1+8.4*1
=4*(98+1+1)
=4*100
=400
4*1.02
=4*1+4*0.02
=4+0.08
=4.08
3.5/21
=(3.5*2)/(21*2)
=7/42
=1/6
305
408.8
4.08
1/6
简算 简算,全是简算 急急急急急急急急急急急急急急急急急急,,,,快!视频
相关评论: