问题 解答题
用简便方法计算.(写出主要过程)
6.3+7.28+3.7=102×45=
答案

(1)6.3+7.28+3.7,

=7.28+(6.3+3.7),

=7.28+10,

=17.28;

(2)102×45,

=(100+2)×45,

=100×45+2×45,

=4500+90,

=4590.

单项选择题 A3/A4型题
单项选择题