26乘25分之7=?简便 18乘17分之5=?简便 38乘37分之6=?简便
问题描述：
26乘25分之7=?简便 18乘17分之5=?简便 38乘37分之6=?简便
答
26*7/25
=（25+1）*7/25
=25*7/25+1*7/25
=7+7/25
=7又25分之7
18*5/17
=（17+1）*5/17
=17*5/17+1*5/17
=5+5/17
=5又17分之5
38*6/37
=（37+1）*6/37
=37*6/37+1*6/37
=6+6/37
=6又37分之6
答
26× 7/25
=（25+1）×7/25
=25×7/25+1×7/25
=7+7/25
=7又7/25.
------------------------------
18×5/17
=（17+1）×5/17
=17×5/17+1×5/17
=5+5/17
=5又5/17
--------------------------
38×6/37
=（37+1）×6/37
=37×6/37+1×6/37
=6+6/37
=6又6/37
答
26乘25分之7
=25x7/25+7/25
=7+7/25
=7又7/25
18乘17分之5
=17x5/17+5/17
=5+5/17
=5又5/17
38乘37分之6
=37x6/37+6/37
=6+6/37
=6又6/37