题目内容

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.
(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.
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