用简便方法计算三年级 9.9×4.5＋0.45用简便方法计算

9.9×4.5＋0.45用简便方法计算  

9.9×4.5＋0.45用简便方法计算

9.9×4.5+0.45
＝（9.9+0.1）×4.5
＝10×4.5
＝45
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1.9×4.5＋0.45怎么用简便方法计算？

8.55+0.45
=9

2.9×4.5＋0.45 简便方法

2.9×4.5＋0.45
=2.9×4.5＋0.1×4.5
=4.5×(2.9+0.1)
=3×4.5
=13.5

简便计算：1.9×4.5+0.45怎么算

1.9×4.5+0.45
=1.9×4.5+0.1×4.5
=（1.9+0.1）×4.5
=2×4.5
=9

9. 9×4.5+0.45怎样简便计算。

9. 9×4.5+0.45
=4.5×9.9+4.5×0.1
=4.5×（9.9+0.1）
=4.5×10
=45

用简便方法计算0.45×0.46+4.5×0.68

用简便方法计算0.45×0.46+4.5×0.68
0.45×0.46+4.5×0.68
=0.207+3.06
=3.267
直接计算

用简便方法计算:0.2Ⅹ4.5+18Ⅹ0.45

0.2Ⅹ4.5+18Ⅹ0.45
=0.2Ⅹ4.5+1.8Ⅹ4.5
=（0.2+1.8）Ⅹ4.5
=2Ⅹ4.5
=9

1.9×4.5＋0.45 怎样才能简便计算

1.9×4.5＋0.45
=1.9×4.5＋4.5×0.1
=4.5×（1.9+0.1）
=4.5×2
=9

用简便方法计算 0.45乘5.6加4.5乘0.54减0.45

太简单了！就是0.45乘5.6加4.5乘0.54减0.54
=0.45乘5.6加0.45乘5.4减0.54
=0.45乘（5.6加5.4）减0.54
=0.45乘11减0.54
=4.95减0.54
=4.41

0.045*38 0.45*5.4 4.5*0.08用简便方法计算

0.045x38+0.45x5.4+4.5x0.08
=0.045x38+0.045x54+0.045x8
=0.045x（38+54+8）
=0.045x100
=4.5