问题
解答题
| 简便计算下面各题． （
6.8×
|
答案
（
+24 19
）÷8+16 17 15 17
=
×24 19
+1 8
×16 17
+1 8 15 17
=
+(3 19
+2 17
)15 17
=
+13 19
=1
；3 19
6.8×
+0.32×4.2-8÷258 25
=（6.8+4.2-1）×0.32
=10×0.32
=3.2．
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