6.8×(6-0.8)用简便方法
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答案35.36,简便运算: 6.8x(6-0.8) =6.8x6-6.8x0.8 =(7-0.2)x6-(7-0.2)x0.8 =7x6-0.2x6-7x0.8+0.2x0.8 =42-1.2-5.6+0.16 =35.36
咨询记录 · 回答于2022-10-15
6.8×(6-0.8)用简便方法
答案35.36,简便运算: 6.8x(6-0.8) =6.8x6-6.8x0.8 =(7-0.2)x6-(7-0.2)x0.8 =7x6-0.2x6-7x0.8+0.2x0.8 =42-1.2-5.6+0.16 =35.36
答案35.36,简便运算: 6.8x(6-0.8) =6.8x6-6.8x0.8 =(7-0.2)x6-(7-0.2)x0.8 =7x6-0.2x6-7x0.8+0.2x0.8 =42-1.2-5.6+0.16 =35.36
运用数学拆分的思想,6.8=7-0.2,或者6.8=6+0.8,然后进行简便运算,最后计算结果是35.36
6.8x(6-0.8) =6.8x6-6.8x0.8 =(6+0.8)x6-(6+0.8)x0.8 =6x6+0.8x6-6x0.8-0.8x0.8 =36+0.48-0.48-0.64 =35.36
两种简便运算方法
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语音提醒一下,有2种方法