15.8*5.8+4.2*4.2+11.6*4.2
5个回答
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
相关问题
3+5○13-6 11-5○2+4 2+4○15-8 7+8○6+9 13-7○10-4 10-5○10-7 2+3+4
用简便方法运算:(1)3.26*4.5+5.2*3.26+9.7*6.74 (2)15.8*5.8+4.2*4.2+11
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+1+2+3+4+5+6+7+8+9+10+11+
1-2+3-4+5-6+7-8+9-10+11-12+13-14+15-16/-2+4-6+8-.-30+32
2.8,4,5.6,8,11,16,22
[8/5]-[2/15]-[4/15]=[8/5]-([2/15]+[4/15])运用了( )
(1*3*5+3*5*7+5*7*9...+11*13*15)/(2*4*6+4*6*8+6*8*10...+12*14
(8.5*2.4)+(8.5*6)+(2.4*6)*2=
找规律 1,4,5,4,6,4,11( ),( ).2,3,4,5,8,7,( ),( ).0,2,2,4,6,10,(
-30-( +8)-(+6)-(-17)=? l-15I-(-2)-(-5) -6/11-7/9+4/9-5/11