哪个人会简便计算?3.6×31.4+43.9×6.4

来源：学生作业帮助网编辑：作业帮时间：2024/04/20 16:49:48

哪个人会简便计算?3.6×31.4+43.9×6.4
哪个人会简便计算?
3.6×31.4+43.9×6.4

哪个人会简便计算?3.6×31.4+43.9×6.4
3.6×31.4+43.9×6.4
=3.6*31.4+(31.4+12.5)*6.4
=3.6*31.4+31.4*6.4+12.5*6.4
=31.4*(3.6+6.4)+12.5*8*0.8
=31.4*10+100*0.8
=314+80
=394

原式=（10-6.4）31.4+6.4*43.9
=314+6.4*（43.9-31.4）
=314+6.4*12.5
=314+0.8*8*12.5
=314+0.8*100
=394

3.6×31.4+43.9×6.4
=3.6*31.4+31.4*6.4+12.5*6.4
=(3.6+6.4)*31.4+12.5*8*0.8
=10*31.4+100*0.8
=314+80
=394

3.6*25+3.6*6.4+43.9*6.4
=4*25*0.9+(43.9+3.6)*6.4
=90+47.5*6.4
=90+(50-2.5)*64
=90+50*2*32-2.5*4*16
=90+3200-160
=3130

哪个人会简便计算?3.6×31.4+43.9×6.4 五道题, 哪个能简便计算,怎么简便一道简便计算 3.6*31.4+43.9*6.4 1.01×43简便计算 3.6/9.99 简便计算 3.6/10.1简便计算简便计算.做了,一定,会, 简便计算.会做的就做 102*43怎么简便计算 43×2.02的简便计算简便计算3.6除以10.1 3.6×0.99 用简便计算 3.6×1.02怎么简便计算 3.6/2.4用简便计算简便计算 3.6*2.5/1.8 3.6÷2.5简便计算简便计算：1.七分之五乘二十五分之十四加三分之一1.90减九十乘十五分之二简便计算2.17×九分之二×五十一分之二乘九分之二3.42×（十四分之十九 - 二十一分之八）简便计算会哪个写哪个, 0.75*15+4.5*2.5 3.6*31.4+43.9*6.4 简便计算