5.8乘5.8加0.58乘42 36.75乘99加36.75 17.9乘9.9加1.79 （简便运算）
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5.8乘5.8加0.58乘42 36.75乘99加36.75 17.9乘9.9加1.79 （简便运算）
5.8乘5.8加0.58乘42 36.75乘99加36.75 17.9乘9.9加1.79 （简便运算）
5.8乘5.8加0.58乘42 36.75乘99加36.75 17.9乘9.9加1.79 （简便运算）
5.8乘5.8加0.58乘42
=5.8x5.8+5.8x4.2
=5.8x(5.8+4.2)
=5.8x10
=58
36.75乘99加36.75
=36.75x(99+1)
=36.75x100
=3675
17.9乘9.9加1.79
=17.9x9.9+17.9x0.1
=17.9x(9.9+0.1)
=17.9x10
=179
5.8乘5.8加0.58乘42
=5.8×（5.8+4.2）
=5.8×10
=58
36.75乘99加36.75
=36.75×（99+1）
=36.75×100
=3675
17.9乘9.9加1.79
=17.9×（9.9+0.1）
=17.9×10
=179
5.8*（5.8+0.1）=5.8*（6-0.1）=34.8-0.58=34.22
36.75*100=3675
17.9*（9.9+0.1）=179
5.8*5.8+0.58*42=.058*10*5.8+0.58*42=0.58*58+0.58*42=0.58*（58+42）=0.58*100=58
36.75*99+36.75=36.75*（99+1）=36.75*100=3675
17.9*9.9+1.79=17.9*9.9+17.9*0.1=17.9*（9.9+0.1）=17.9*10=179
=5.8×5.8+5.8×4.2
=5.8（5.8+4.2）
=5.8×10
=58
36.75×99+36.75
=36.75（99+1）
=36.75×100
=3675
17.9×9.9+1.79
=1.79×99+1
=1.79（99+1）
=1.79×100
=179