问题
解答题
0.25×2.3×4 2.68×3.5+6.5×2.68 12.75÷[14.6-(1.3+8.2)]
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答案
0.25×2.3×4,
=0.25×4×2.3,
=2.3;
2.68×3.5+6.5×2.68,
=2.68×(3.5+6.5),
=2.68×10,
=26.8;
12.75÷[14.6-(1.3+8.2)],
=12.75÷(14.6-9.5),
=12.75÷5.1,
=2.5;
+3 5
+1 4
,3 20
=
+12 20
+5 20
,3 20
=
,20 20
=1.