1楼:热情的德福人
3.5×0.19+0.35×8.1的简便算法=3.5×0.19+3.5×0.81
=3.5×(0.19+0.81)
=3.5×1
=3.5
就是这样的哈
2楼:宏哥
=3.5×0.19+3.5×0.81
=3.5×(0.19+0.81)
=3.5×1
=3.5
3楼:平凡人生底蕴
=0.35ⅹ(1.9+8.1)
=0.35x10
=3.5
3.5*0.19+0.35*8.1的简便算法
4楼:哥被震精了
3.5*0.19+0.35*8.1
=3.5*0.19+3.5*0.81
=3.5*(0.19+0.81)
=3.5*1
=3.5
2.5×9.8的简便算法
5楼:不是苦瓜是什么
2.5×9.8
=2.5×10-2.5×0.2
=25-0.5
=24.5
小数乘法的运算法则:
1、先按照整数乘法的法则求出积;
2、再看被乘数和乘数一共有几位小数,就从积的右边起数出几位,点上小数点;
3、如果小数的末尾出现0时,根据小数的基本性质,把小数末尾的0划去。
6楼:宠爱此生
=2.5×10-2.5×0.2
=25-0.5
=24.5
3.5x0.19 0.35x8.1
7楼:幽灵漫步祈求者
3.5x0.19+0.35x8.1
=0.35x1.9+0.35x8.1
=0.35x(1.9+8.1)
=0.35x10
=3.5
8楼:平阳虎
3.5x0.19+0.35x8.1
=3.5×0.19+3.5×0.81
=3.5×(0.19+0.81)
=3.5×1
=3.5
0.35×3.5×99简便算法 10
9楼:枫叶
0.35+3.5×99
=3.5×(0.1+99)
=3.5×99.1
=346.85
你好,本题已解答,如果满意
请点右下角“采纳答案”。
10楼:匿名用户
0.35×3.5×99
=1.225×99
=1.225×(100-1)
=122.5-1.225
=121.275
11楼:匿名用户
0.35×3.5×99
=(3.5x3.5)x9.9
=(3x4+0.5x0.5)x9.9
=12.25x10-12.25x0.1
=122.5-1.225
=121.275
12.3×3.5×0.8简便算法
12楼:凌月霜丶
12.5×3.5×0.8简便算法
12.5×3.5×0.8
=3.5*(12.5*0.8)
=3.5*10=35
13楼:匿名用户
(125*8*35-2*35*8)*0.001=34.44
3.5×9.9 3.5×0.1简便计算
14楼:宠爱此生
3.5×9.9 +3.5×0.1
=3.5×(9.9+0.1)
=3.5×10
=35满意望采纳
15楼:匿名用户
利用乘法的分配律即
3.5x9.9十3.5x0.1
二3.5x(9.9十0.1)
二3.5x10二35
16楼:热情的德福人
3.5×9.9+3.5×0.1简便计算
解:原式=3.5×(9.9+0.1)
=3.5×10
=35分析:
运用乘法结合律
3.5×9.9-3.5×0.1
解:原式=3.5×(9.9-0.1)
=3.5×(10-0.2)
=3.5×10-3.5×0.2
=35-0.7
=34.3
分析:运用乘法结合律
3.5×9.8+0.35×2的简便运算中0.2是怎么来的
17楼:匿名用户
3.5×9.8+0.35×2
=3.5x9.8+3.5x0.2
=3.5x(9.8+0.2)
=3.5x10
=350.35x2=3.5x0.2(乘法:一个因数扩大10倍,另一个因数缩小10倍,所得的积不变)
18楼:匿名用户
3.5×9.8+0.35×2
=3.5×9.8+3.5×0.2
=3.5×(9.8+0.2)
=3.5×10=35
3.5×1.68+0.35×3.2简便计算
19楼:小猪打小兔
3.5×1.68+0.35×3.2
=3.5×1.68+3.5×0.32
=3.5×(1.68+0.32)
=3.5×2=7
20楼:zwb启东
解:3.5×1.68+0.35×3.2=3.5*1.68+3.5*0.32=3.5*(1.68+0.32)=7。
0.35 9.9用简便方法汁算,0.35乘以9.9的简便算法
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