29.94-(19.94+12.8)+2.8用简便计算尽快
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29.94-(19.94+12.8)+2.8用简便计算尽快
29.94-(19.94+12.8)+2.8用简便计算
尽快
29.94-(19.94+12.8)+2.8用简便计算尽快
29.94-(19.94+12.8)+2.8
=29.94-19.94-12.8+2.8
=(29.94-19.94)-(12.8-2.8)
=0
29.94-(19.94+12.8)+2.8
=29.94-19.94-12.8+2.8
=(29.94-19.94)-(12.8-2.8)
=10-10
=0
(29.94-19.94)+(-12.8+2.8)= 0
(29.94-19.94)-(12.8+0.2)+(2.8+0.2)
10-13+3
0
=(29.94-19.94)-(12.8-2.8)=10-10=0
29.94-(19.94+12.8)+2.8用简便计算尽快
19.94-100+99-98+...+3-2+1简便计算
x-1+2-3+4-5+.-99+100=19.94解法
4(x-2)=12.8
1.1994+199.4+19.94+1.994
1994+199.4+19.94+1.994
19.94+99.7×99.8
x-1+2-3+4-5+6-7+8……-99+100=19.94x等于多少?
12.8/0.25/2/0.2简便算法
2(x-0.5)=12.8怎么解?
2x-3.2=12.8解.
20.06×1995-19.94×2006
巧算:1994+199.4+19.94+1.994
19.94+99.7×99.8 help me
12.8X34.5+12.8X12.3+46.8X87.2=?简便运算!
简便计算:20.06×1995-19.94×2006
20.11乘1995减19.94乘2011
12.8-2.4x=4(x+2)