作业帮简便运算38×7+31×14
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/05 19:57:40
简便运算38×7+31×14
简便运算38×7+31×14
简便运算38×7+31×14
38×7+31×14
=19*14+31*14
=（19+31）*14
=50*14
=700
原式=(38+31*2)*7=100*7=700
38×7+31×14
=（38+31×2）×7
=（38+62）×7
=100×7
=700
38×7+31×14
=38×7+62×7
=（38+62）×7
=100×7
=700
38*7+31*14=38*7+31*2*7=38*7+62*7=(38+62)*7=100*7=700
38×7+31×14
=38×7+62×7
=(38+62)×7
=100×7
=700
38×7+31×14
=38×7+31×2×7
=38×7+62×7
=（38+62）×7
=100×7
=700
38×7+31×14
38x7+31x7x2
=38x7+62x7
=(38+62)x7
=100x7
=700
38×7+31×14
=38×7+31×2×7
=【38+7+2】×7
=47×7
=329