帮我做几道数学题（要简便运算）

帮我做几道数学题（要简便运算） 要快
33.3乘334+99.9乘222 缉浮光簧叱毫癸桐含昆45.6乘6.7+4.56乘31+0.456乘20

15.8乘5.8+4.2乘4.2+11.6乘4.2

（0.05+0.05+0.05）乘9+0.05乘73

*是乘的意思。

1.解：33.3*334+99.9*222
=33.3*334+33.3*3*222
=33.3*334+33.3*666
=33.3*(334+666)
=33.3*1000
=33300

2.解：45.6*6.7+4.56*31+0.456*20
=45.6*6.7+45.6*3.1+45.6*0.2
=45.6*(6.7+3.1+0.2)
=456

3.解：15.8*5.8+4.2*4.2+11.6*4.2
=15.8*5.8+4.2*（4.2+11.6）
=15.8*5.8+4.2*15.8
=15.8*(5.8+4.2)
=15.8*10
=158

4.解：(0.05+0.05+0.05)*9+0.05*73
=0.05*3*9+0.05*73
=0缉浮光簧叱毫癸桐含昆.05*27+0.05*73
=0.05*（27+73）
=0.05*100
=5

33.3*334+33.3*3*222 =33.3*334+33.3*666 =33.3*(334+666) =33.3*1000 =33300 45.6*6.7+45.6*3.1+45.6*0.2 =45.6*(6.7+3.1+0.2) =45.6*10 =456 (0.05+0.05+0.05)*9+0.05*73 =0.05*3*9+0.05*73 =0.05*27+0.05*73 =0.05*（27+73） =0.05*100 =5 15.8*5.8+4.2*4.2+11.6*4.2 =15.8*5.8+4.2*（4.2+11.6） =15.8*5.8+4.2*15.8 =15.8*(5.8+4.2) =15.8*10 =158

1.原式=33.3*（334+3*222）=33.3*1000=33300 2.原式=4.56*（67+31+2）=456 3.原式=15.8*（10-4.2）+4.2*4.2+11.6*4.2 =158-15.8*4.2+4.2*4.2+11.6*4.2 =158-[4.2*（15.8-4.2-11.6）]=158 4.原式=3*0.05*9+0.05*73 =0.05*（27+73）=5

1.解：33.3*334+99.9*222 =33.3*(334+666) =33.3*1000 =33300 2.解：45.6*6.7+4.56*31+0.456*20 =45.6*6.7+45.6*3.1+45.6*0.2 =45.6*(6.7+3.1+0.2) =456 3.解：15.8*5.8+4.2*4.2+11.6*4.2 =15.8*5.8+4.2*15.8 =15.8*(5.8+4.2) =15.8*10 =158 4.解：(0.05+0.05+0.05)*9+0.05*73 =0.05*27+0.05*73 =0.05*（27+73） =0.05*100 =5

15.8x5.8+4.2x4.2+11.6x4.2 =4.2+5.8=10 x 4.2+15.8=20 =11.6x4.2=48.72x200=248.72 \

提公因式，617*（957+1043）=617*2000=1234000，第二个一样”