问题 解答题
脱式计算.
24+16×11÷81.25×32×2.5(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
)]
答案

(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.

判断题
问答题