问题 解答题
用简便方法计算:
907×99+907
1.2×16+8.4×12
18
23
÷
8
5
+
18
23
×
3
8
答案

①907×99+907,

=907×(99+1),

=907×100,

=90700;

②1.2×16+8.4×12,

=1.2×16+84×1.2,

=1.2×(16+84),

=120;

18
23
÷
8
5
+
18
23
×
3
8

=

18
23
×
5
8
+
18
23
×
3
8

=

18
23
×(
5
8
+
3
8
),

=

18
23
×1,

=

18
23

问答题
问答题 简答题