小学奥数简便算法

2025-04-27 05:11:07
推荐回答(3个)
回答1:

(33221-332.21)÷(66442-664.42)
=33221(1-0.01)/66442(1-0.01)
=33221/66442
=33221/33221*2
=1/2
=0.5

(2002002+200.2002)÷(8008008+800.8008)
=2002002(1+0.0001)/8008008(1+0.0001)
=2002002/2002002*4
=1/4
=0.25

(1234+123.4-12.34)-(2468+246.8-24.68)
=1234(1+0.1-0.01)/2468(1+0.1-0.01)
=1234/1234*2
=1/2
=0.5

回答2:

(33221-332.21)÷(66442-664.42)
=(33221-332.21)÷2(33221-332.21)
=0.5

(2002002+200.2002)÷(8008008+800.8008)
=(2002002+200.2002)÷4(2002002+200.2002)
=0.25

回答3:

(1)(33221-332.21)÷(66442-664.42)
=(33221-332.21)÷[(33221-332.21)×2]
=(33221-332.21)÷(33221-332.21)÷2
=1÷2
=0.5
(2)(2002002+200.2002)÷(8008008+800.8008)
=(2002002+200.2002)÷(2002002+200.2002)÷4
=0.25
(3) (1234+123.4-12.34)-(2468+246.8-24.68)
=(1234+123.4-12.34)—(1234+123.4-12.34)*2
=—(1234+123.4-12.34)
=—1345.06