5.56乘以4减去4.56除以0.25怎么简便运算

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5.56乘以4减去4.56除以0.25怎么简便运算
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5.56乘以4减去4.56除以0.25怎么简便运算
5.56乘以4减去4.56除以0.25怎么简便运算

5.56乘以4减去4.56除以0.25怎么简便运算
5.56乘以4减去4.56除以0.25
=5.56x4-4.56x4
=(5.56-4.56)x4
=1x4
=4

5.56*4-4.56/(0.25)
=5.56*4-4.56*4
=4(5.56-4.56)
=4*1
=4

设第一个数是x, 第二个是x+4,第三个为(x+2)/2,第四个是2(x+2)
则x+x+4+(x+2)/2+2(x+2)=99
9/2x=90
x=20
所以四个数分别为,20,24,11,和44