题目内容

脱式计算.
24+16×11÷8 1.25×32×2.5 (2.8+3.85÷3.5)×0.2
4
7
+
1
5
-
3
7
+
4
5
10.9-(
2
5
+9.6÷4)
5
6
÷[1-(
3
4
+
1
12
)]
(1)24+16×11÷8,
=24+176÷8,
=24+22,
=46;

(2)1.25×32×2.5,
=1.25×4×8×2.5,
=(1.25×8)×(2.5×4),
=10×10,
=100;

(3)(2.8+3.85÷3.5)×0.2,
=(2.8+1.1)×0.2,
=3.9×0.2,
=0.78;

(4)
4
7
+
1
5
-
3
7
+
4
5

=(
4
7
-
3
7
)+(
1
5
+
4
5
),
=
1
7
+1,
=1
1
7


(5)10.9-(
2
5
+9.6÷4),
=10.9-(
2
5
+2.4),
=10.9-2.8,
=8.1;

(6)
5
6
÷[1-(
3
4
+
1
12
)]

=
5
6
÷[1-
5
6
],
=
5
6
÷
1
6

=5.
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