4.99+4.99+4.99+0.04+4.99

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4.99+4.99+4.99+0.04+4.99
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4.99+4.99+4.99+0.04+4.99
4.99+4.99+4.99+0.04+4.99

4.99+4.99+4.99+0.04+4.99
0.04拆分成4个0.01

20

20

20

把0.04分成4个0.01,再与4个4.99相加

先4x9=36

20

很简单的

20

4.99*3+0.04

1353

吧四个0.01分给四个4.99就是一共四个五是20

4.99乘以4+0.04=20

20

4.99+4.99+4.99+0.04+4.99
=(4.99+0.1)+(4.99+0.1)+(4.99+0.1)+(4.99+0.1)
=5+5+5+5
=20

(4.99×4)+0.04=20

4.99+4.99+4.99+0.04+4.99
=(4.99+0.01)×4
=5×4
=20

=4.99×4+0.04
=(5-0.01)×4+0.04
=20

5+5+5+5=20

4.99×4+0.04

等于4个(4.99+0.01)

=(5-0.01)×4+0.04
=5×4-0.01×4+0.04
=5

4.99×4+0.04

0.04拆分成4个0.01,再分别和4.99相加。就是4个5的和了,等于20

4(4.99+0.01)

5+5+5+5+0.04-4-0.01

把4.99当5来算,就得4乘以5得20每个4.99都多个0.01。4个就是0.04,它刚好和式子中的约掉,就得20

手机上不是有计算器吗,