7.6×2.8+72×0.76的简便方法? 7.6×2.4+0.75×76+0.76的简便运算?
7.6\u00d72.4+7.5\u00d77.6+0.76\u7684\u7b80\u4fbf\u8fd0\u7b97\u600e\u4e48\u51997.6x2.4+7.5x7.6+0.76
=7.6x2.4+7.5x7.6+7.6x0.1
=7.6x(2.4+7.5+0.1)
=7.6x10
=76
\u5229\u7528\u4e58\u6cd5\u5206\u914d\u5f8b\u8ba1\u7b97\uff0c\u671b\u91c7\u7eb3\uff01
根据题意,这道题用到的简便计算方法是乘法分配律和乘法结合律,计算方法如下:原式=7.6*2.8+7.2*7.6=7.6*(2.8+7.2)=7.6*10=76。
题目:
7.6×28+72×0.76简便计算。
解析:
观察发现7.6=0.76×10,可以以此为突破口,对原式进行转换后再寻求简便计算方法。
解答:
7.6×2.8+72×0.76
=7.6×2.8+7.2×10×0.76
=7.6×2.8+7.2×(10×0.76)
=7.6×2.8+7.2×7.6
=(2.8+7.2)×7.6
=10×7.6
=76
方法二:
7.6×2.8+72×0.76
=(0.76×10)×2.8+72×0.76
=0.76×(10×2.8)+72×0.76
=0.76×28+72×0.76
=(28+72)×0.76
=100×0.76
=76
你好,7.6*2.8+72*0.76=0.76*28+72*0.76=0.76*(28+72)=0.76*100=76 找关注两边乘法的相似点,根据相似点,根据等量关系,转化成相同点,然后把相同点提出来,剩余的两个数想加得100,进而可以更加简便的得出结果!!
7.6×2.8+72×0.76
=7.6×2.8+7.6×0.1×7.2×10
=7.6×(2.8+7.2)
=7.6×10
=76
7.6*2.8+72*0.76简便计算方法
=7.6*(2.8+7.2)
=7.6*10
=76
绛旓細6.5x2.4+65x0.76 =6.5x2.4+6.5x7.6 =6.5x(2.4+7.6)=6.5x10 =65