86点2乘10点1减去86点2简便怎么算
86点2乘10点1减去86点2简便怎么算
86.2x10.1一86.2
=(86.2x86.2)一10.1
=?
94乘86加94乘16减94乘2简便演算法
=(86+16-2)*94
=100*94
=9400
42.35减去10.5-2点35的简便方法怎么算
42.35-10.5-2.35
=(42.35-2.35)-10.5
=40-10.5
=29.5
8点2乘以101减去8店2的简便方法
8点2乘以101减去8店2
=8.2*(101-1)
=8.2*100
=820
86乘128减86乘29加86的简便运算
86×128-86×29+86
=86×(128-29+1)
=86×(128+1-29)
=86×(129-29)
=86×100
=8600
7点86乘3点|4加6点86X7点86十7点86简便方法
39X148/149+148X86/149+48X74/149 =148X(39/149+86/149)+48X74/149 =148X125/149+48X74/149 =(148X125+48X74)X1/149 =(18500+3552)X1/149 =22052X1/149 =148
无点27 2点86-0点66 1点63的简便方法
5.27+2.86-0.66+1.63
=5.27+1.63+2.86-0.66
=6.9+2.2
=9.1
2000乘1999减去1999乘1998加1998乘1997减去1997乘1996加.加2乘1要怎么简便演算法
2000×1999-1999×1998+1998×1997-1997×1996+………+2×1
=1999×(2000-1998)+1997×(1998-1996)+………+1×2
=1999×2+1997×2+1995×2+………+1×2
=(1999+1997+1995+………+1)×2
=(1999+1)×1000÷2×2
=2000×1000
=2000000
32点3减(5点02加2点03乘10)用简便计算
=32.3-(5.02+20.3)
=32.3-5.02-20.3
=32.3-20.3-5.02
=12-5.02
=6.98
86点7×10点一的简便计算
86.7x10.1
=86.7x(10+0.1)
=86.7x10+86.7x0.1
=867+8.67
=875.67