Question

简便运算14.5+3.7+5.5

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%D%A

Answer 2

14.5+3.7+5.5
=(14.5+5.5)+3.7
=20+3.7
=23.7

Answer 3

（14.5+5.5）+3.7=20+3.7=23.7

Answer 4

追答

望采纳谢谢

Answer 5