131+132+133+134+135=______×______=______.
问题描述:
131+132+133+134+135=______×______=______.
答
131+132+133+134+135,
=(133-2)+(133-1)+133+(133+1)+(133+2),
=(133+133+133+133+133)+(2-2+1-1),
=133+133+133+133+133,
=133×5,
=665;
故答案为:133,5,665.
答案解析:因为133=132+1,而133=134-1;133=131+2,而133=135-2,所以这个算式可以变成5个133相加,再根据乘法的意义写成乘法算式.
考试点:整数的乘法及应用.
知识点:解决本题关键是先把算式变成几个相同加数和的形式,再根据乘法的意义写成乘法算式求解.