Question

求简便运算（要有过程） [ 标签：简便 运算,运算,过程 ]

9999x1111+3333x667=?19.98x37-199.8x1.9+1998x0.82=？3.17-2.74+4.7+5.29-0.26+6.3=?34.5x8.23+34.5x2.77-34.5=?0.125x0.25x0.5x64=?75x4.7+15.9x25=?172.4x6.2+2724x0.38=?13.5x9.9+6.5x10.1=?11.8x43-860x0.09=?

Answer 1

简便计算这一块其实多数都用到乘法分配律和结合律，还有乘法的性质，一定要熟练掌握，灵活运用，还要注意关观察式子中各数量之间的关系哦第一个要么多个1要么少个69999x1111+3333x6667=3333x3x1111+3333x6667=3333x3333+3333x6667=3333x（3333+6667）=3333x10000=3333000019.98x37-199.8x1.9+1998x0.82=19.98x37-19398x19+19.98x82=19.98x(37-19+82)=19.98x100=19983.17-2.74+4.7+5.29-0.26+6.3=(3.17+5.29)+(4.7+6.3)-(2.74+0.26)=8.46+11-3=16.4634.5x8.23+34.5x2.77-34.5=34.5x(8.23+2.77-1)=34.5x10=3450.125x0.25x0.5x64=0.125x0.25x0.5x8x4x2=（0.125x8）x（0.25x4）x（0.5x2）=1x1x1=175x4.7+15.9x25=25x3x4.7+15.9x25=25x14.1+15.9x25=25x（14.1+15.9）=25x30=750172.4x6.2+2724x0.38=1724x0.62+（1724+1000）x0.38=1724x0.62+1724x0.38+1000x0.38=1724x（0.62+0.38）+380=1724x1+380=210413.5x9.9+6.5x10.1=13.5x（10-0.1）+6.5x（10+0.1）=135-1.35+65+0.65=200-0.7=199.311.8x43-860x0.09=11.8x43-43x20x0.09=11.8x43-43x1.8=43x（11.8-1.8）=43x10=430

Answer 2

9999x1111+3333x667=3333x3x1111+3333x667=3333x3333+3333x667=3333x(3333+667)=3333x4000=1333200019.98x37-199.8x1.9+1998x0.82=1998x0.37-1998x0.19+1998x0.82=1998x(0.37-0.19+0.82)=1998x1=19983.17-2.74+4.7+5.29-0.26+6.3=(3.17+5.29)+(4.7+6.3)-(2.74+0.26)=8.46+11-3=16.4634.5x8.23+34.5x2.77-34.5=34.5x(8.23+2.77-1)=34.5x10=3450.125x0.25x0.5x64=(0.125x8)x(0.125x8)x0.5=1x1x0.5=0.575x4.7+15.9x25=25x3x4.7+15.9x25=25x14.1+25x15.9=25x(14.1+15.9)=25x30=750172.4x6.2+2724x0.38=172.4x10x0.62+(1724+1000)x0.38=1724x0.62+1724x0.38+1000x0.38=1724x(0.62+0.38)+380=1724+380=210413.5x9.9+6.5x10.1=13.5x(10-0.1)+6.5x(10+0.1)=135-1.35+65+0.65=(135+65)-(1.35-0.65)=200-0.7=199.311.8x43-860x0.09=11.8x43-43x20x0.09=11.8x43-43x1.8=43x(11.8-1.8)=43x10=4309999x1111+3333x6667=3333x3x1111+3333x6667=3333x3333+3333x6667=3333x(3333+6667)=3333x10000=33330000

Answer 3

9999x1111+3333x6667=9999x1111+3333x6666+3333=9999x1111+9999x2222+3333=9999(1111+2222)+3333=3333(9999+1)=3333x10000=33330000

Answer 4

=3333*(3*1111)+3333*6667=3333*(3333+6667)=33330000