问题 解答题
能简算就简算.
1.25×7×0.8

7.28-3.14+1.72-2.86
(100-1456÷26)×78
1
12
+
1
9
+
3
18
)×36.
答案

(1)1.25×7×0.8,

=7×(1.25×0.8),

=7×1,

=7;

(2)7.28-3.14+1.72-2.86,

=7.28+1.72-(3.14+2.86),

=9-6,

=3;

(3)(100-1456÷26)×78,

=(100-56)×78,

=44×78,

=3432;

(4)(

1
12
+
1
9
+
3
18
)×36,

=

1
12
×36+
1
9
×
36+
3
18
×
36,

=3+4+6,

=13.

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