作业帮88x0.25x9简算
来源：学生作业帮助网 编辑：作业帮 时间：2024/06/03 02:48:43
8.9X9.9+11X0.99=89X0.99+11X0.99=0.99X（89+11）=0.99X100=993.46X1.23+3.46X4.56+5.79X6.54=3.46X（1.23+4.5
（1）9.81X9.8=9.81×（10-0.2）=98.1-1.962=96.138（2）0.027+9.9X0.27=0.027+99×0.027=0.027×（1+99）=0.027×100=2
0.42X9.9+0.042=0.42×9.9+0.42×0.1=0.42×(9.9+0.1)=0.42×10=4.212.5X（100+0.8）=12.5×100+12.5×0.8=1250+10=
4分之3x9分之7+0.75x9分之2=3/4x(7/9+2/9)=3/4x1=3/42.5x1.25x32=2.5x4x(1.25x8)=10x10=10049.5-17.25-2.25=49.5-
3.6-3.6×0.5=3.6×(1-0.5)=3.6×0.5=1.8
3/10(200+x)-2/10(300+x)=300×9/25两边乘10600+3x-600-2x=1080x=1080
20/37X9/29+9/37X17/29=20/37X9/29+17/37X9/29=(20/37+17/37)X9/29=1X9/29=9/29
41.2×8.1+11×9.25+53.7×1.9=41.2×8.1+11×9.25+(41.2+12.5)×1.9=41.2×8.1+41.2×1.9+11×9.25+12.5×1.9=41.2×(
1.25x0.25x0.05x64=1.25x0.25x0.05x8×8=1.25x8x0.25x(0.05x8)=10x0.25x0.4=2.5x0.4=1
88x0.25x9＝（22×4）×0.25×9＝（22×9）×（4×0.25）＝198×1＝19838.25÷[14.6一(5.4+4.1)]＝38.25÷[14.6－9.5]＝38.25÷5.1＝3
第三行是987,不是978.第四行答案是4.第五行是98765和3
第一题=〔(-8)*0.125〕的55次方*-8的2次方=-1的55次方*-8的2次方=-1*64=-64第二题=3*3的2m次方=3的21次方也就是3的1+2m次方=3的21次方即1+2m=21,m
=(0.8×12.5)×(9.5×0.2)=10×1.9=19
2.5x3.2x1.25=2.5×4×0.8×1.25=10×1=101.98x9.9=1.98×（10-0.1）=19.8-0.198=19.602
25×9.2－1.25×1.2＝25×4×2.3－1.25×0.8×1.5＝100×2.3－1×1.5＝230－1.5＝230－2＋0.5＝228.5
9.5（100x0,98+2）=9.5x100=950
9876X9+4=8888898765X9+3=888888
12.5x0.25x0.05x37x6.4=12.5×0.25×0.05×37×0.4×8×0.2=12.5×8×0.25×0.4×0.05×0.2×37=100×0.1×0.01×37=3.712.
原式=6/25乘以1/9+6/25乘以8/9=6/25乘以（1/9+8/9）=6/25乘以1=6/25