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