几道数学计算题,
问题描述:
几道数学计算题,
0-(-64)-(+43)+(-49)-(+15)
(-2)+3+6+(-3)+2+(-4)
(+6.1)-(-4.3)+(+2.1)-5.7
3.54+(-3.72)-(-15.46)-(+5.28)
(-121.3)+(-78.5)-(8又2分之1)(-121.3)
(-39又19分之18)*(-15)
-15*43+(-15)*21-(-15)*164
-1的2次方-[2-(-3)的2次方]*|1/5-1/3|/(-1/10)
全部都要写过程,写了的再加10分,
答
1:0-(-64)-(+43)+(-49)-(+15) =0+64-43-49-15= 21-49-15=6-49=-43(-2)+3+6+(-3)+2+(-4) =-2+3+6-3+2-4=1+6-7+2 =2(+6.1)-(-4.3)+(+2.1)-5.7 =6.1+4.3+2.1-5.7=10.4+2.1-5.7=12.5-5.7=6.83.54+(-3.72)-(-15.46)-...