简便运算38×7+31×14
问题描述：
简便运算38×7+31×14
答
38×7+31×14
=38×7+31×2×7
=38×7+62×7
=（38+62）×7
=100×7
=700
答
38x7+31x7x2
=38x7+62x7
=(38+62)x7
=100x7
=700
答
38*7+31*14=38*7+31*2*7=38*7+62*7=(38+62)*7=100*7=700
答
原式=(38+31*2)*7=100*7=700
答
38×7+31×14
=38×7+62×7
=(38+62)×7
=100×7
=700
答
38×7+31×14
=（38+31×2）×7
=（38+62）×7
=100×7
=700
答
38×7+31×14
答
38×7+31×14
=19*14+31*14
=（19+31）*14
=50*14
=700
答
38×7+31×14
=38×7+31×2×7
=【38+7+2】×7
=47×7
=329
答
38×7+31×14
=38×7+62×7
=（38+62）×7
=100×7
=700