问题
解答题
计算.(能简算的要简算) 1375+450÷18×25 18÷1.5-0.2×0.7 24×(
|
答案
1375+450÷18×25,
=1375+25×25,
=1375+625,
=2000;
18÷1.5-0.2×0.7,
=12-0.14,
=11.86;
24×(
+1 4
-1 8
),1 3
=24×
+24×1 4
-24×1 8
,1 3
=6+3-8,
=1;
×17+8÷13 25
,25 13
=
×17+8×13 25
,13 25
=
×(17+8),13 25
=
×25,13 25
=13;
20.21-3.55-6.45,
=20.21-(3.55+6.45),
=20.21-10,
=10.21;
×[12÷(4 5
+3 8
)]1 8
=
×(12÷4 5
),1 2
=
×24,4 5
=
,96 5
=19.2.