56.5x9.9+56.5
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56.5x9.9+5.65的简便算式56.5x9.9+5.65的简便算式56.5x9.9+5.65的简便算式56.5×9.9+5.65=5.65×99+5.65=5.65×(99+1)=5.65×10
小数乘法的简便计算56.5x9.9+56.5小数乘法的简便计算56.5x9.9+56.5小数乘法的简便计算56.5x9.9+56.556.5×9.9+56.5=56.5×(10-0.1)+56.5=5
9x99x99x99×9=819×9------81如果看不明白就九个九相加9+9+9+9+9+9+9+9=81验算的话:81÷9=99x9=819x9是9个9,因为8个9是72,再加一个9就是81了
3.228x(-9)+(-3.272)x9-(-1.5)x93.228x(-9)+(-3.272)x9-(-1.5)x93.228x(-9)+(-3.272)x9-(-1.5)x9仔细观察,可以将式子
2.34x9.9+0.2342.34x9.9+0.2342.34x9.9+0.2342.34x9.9+0.234=2.34x9.9+2.34x0.1=2.34x(9.9+0.1)=2.34x10=23
5.9x9.9+0.59怎么简算5.9x9.9+0.59怎么简算5.9x9.9+0.59怎么简算5.9x9.9+0.59=5.9x9.9+5.9x0.1=5.9(9.9+0.1)=5.9x10=59
9+9x9=()+()x9=90000018+98x9=()+()x9=9000000117+987x9=()+()x9=90000000找规律9+9x9=()+()x9=90000018+98x9=
0.8x33x1.257.2x9.90.8x33x1.257.2x9.90.8x33x1.257.2x9.90.8x33x1.25=4/5×5/4×33=1×33=337.2x9.9=7.2×(10-
19+9X9=100118+98X9=1000117+987X9=10000116+98719+9X9=100118+98X9=1000117+987X9=10000116+9873X9=100000
19=1x9+(1+9)29=2x9+(2+9)39=3x9+(3+9)1289=?19=1x9+(1+9)29=2x9+(2+9)39=3x9+(3+9)1289=?19=1x9+(1+9)29=2
小学数学题9x5+9=()+9=( ),9X5+9=( )X9= ( )小学数学题9x5+9=()+9=( ),9X5+9=( )X9= ( )小学数学题9x5+9=()+9=( ),9X5+9=(
一道数学题,7.61x9.9+0.761能简算吗?一道数学题,7.61x9.9+0.761能简算吗?一道数学题,7.61x9.9+0.761能简算吗?7.61x9.9+0.761=7.61×9.9+7
9.9X9.9加1.99等于?9.9X9.9加1.99等于?9.9X9.9加1.99等于?100101.7901答案是100=(10-0.1)(10-0.1)+1.99=100-2*10*0.1+0.
1.9x9.9+0.19简便计算1.9x9.9+0.19简便计算1.9x9.9+0.19简便计算
12.7x9.9+12.7怎样简便计算12.7x9.9+12.7怎样简便计算12.7x9.9+12.7怎样简便计算12.7*10-12.7*0.1+12.7
8.7x9.9+0.87怎么简算要过程8.7x9.9+0.87怎么简算要过程8.7x9.9+0.87怎么简算要过程8.7x9.9+0.87=8.7x9.9+8.7*0.1=8.7x(9.9+0.1)=
47.8x9.9+4.78怎样简便计算47.8x9.9+4.78怎样简便计算47.8x9.9+4.78怎样简便计算47.8×9.9+4.78=47.8×9.9+47.8×0.1=47.8×(9.9+0
13.2x9.9+1.32=简便计算13.2x9.9+1.32=简便计算13.2x9.9+1.32=简便计算13.2x9.9+1.32=13.2x9.9+13.2×0.1=13.2×(9.9+0.1)
根号9X9+19等于多少根号9X9+19等于多少根号9X9+19等于多少9X9+19=81+19=100是根号下(9*9+19),还是根号9,乘以9+19,还是根号(9*9)+19?????9*9=8
3.82X9.9+0.382?要简便计算!3.82X9.9+0.382?要简便计算!3.82X9.9+0.382?要简便计算!原式=3.82x9.9+3.82x0.1=3.82x(9.9+0.1)=3