56×9.9+5.6简便
56×9.9+5.6的简便计算怎么写? -
56×9.9＋5.6 =5.6×99+5.6×1 =5.6×（99+1）5.6×100 =560
回答：56×(10)-0.1+5.6
56×9.9＋5.6 =5.6×99+5.6×1 =5.6×（99+1）5.6×100 =560
回答：56×(10)-0.1+5.6
56×9点九用简便计算那就是把9.9变成10-0.1啊。这样就得到56×10-56×0.1。560-5.6.=554.4
56×9.9 ＝56×（10-0.1）＝56×10-56×0.1 ＝560-5.6 ＝554.4 你好，本题已解答，如果满意请点右上角“采纳答案”。
56×9.9怎么简便? -
简便计算56×9.9 解题思路：不能进行简便运算的按顺序计算，简便运算核心是运用加法和乘法各种定律进行计算，计算出整数部分方便后续计算的过程解题过程：56×9.9 =56×9.9 =554.4 存疑请追问，满意请采纳，
56×9.9+5.6 =5.6*99+5.6 =5.6(99+1)=5.6*100 =560 八分之七×九分之十三+九分之十三÷8 =八分之七×九分之十三+九分之十三*1/8 =(13/9)(7/8+1/8)=13/9 32×五分之一+67÷5+0.2 =32*0.2+67*0.2+0.2 =0.2(32+67+1)=0.2*100 =20 不懂可追问满意说完了。
5.6x9.9=5.6x10-5.6x0.1=55.44是对的还是错的? -
回答完全正确。可以验算一下，不管是怎么算，结果都是这个55.44。整个列式也正确，就是计算的原则应该是先乘除后加减，这是规律。
5.6×9.9 =5.6×（10-0.1）5.6×10-5.6×0.1 =56-0.56 =55.44
5.6*9.9 用简便方法怎么算? -
5.6×9.9 =5.6x(10-0.1)=5.6x10-5.6x0.1 =56-0.56 =55.44
这道题的简便算法是逆用乘法分配律。56×9.9+5.6×0.2-5.6 =56×(10-0.1)-5.6×(1-0.2)=56×10-56×0.1-5.6×0.8 =560-(5.6×1+5.6×0.8)=560-5.6×(1+0.8)=560-5.6×1.8 =560-5.6×(2-0.2)=560-5.6×2+5.6×02 =560-11.2+1.12 =548.8+1好了吧！