问题 解答题
脱式计算(能简便计算的要简算)
10.28+0.98+79.72+10.02
2700×(506-499)÷900
(
4
9
+
5
12
-
7
18
)×36

(0.65+
7
20
5
6
×4.8.
答案

(1)10.28+0.98+79.72+10.02,

=(10.28+79.72)+(0.98+10.02),

=90+11,

=101;

(2)2700×(506-499)÷900,

=2700×7÷900,

=2700÷900×7,

=3×7,

=21;

(3)(

4
9
+
5
12
+
7
18
)×36

=

4
9
×36+
5
12
×36+
7
18
×36

=16+15+14

=45;

(4)(0.65+

7
20
)÷
5
6
×4.8

=(0.65+0.35)×

6
5
×4.8

=1×1.2×4.8

=5.76.

单项选择题
单项选择题