问题
解答题
|
答案
(1)1.2×2.5,
=0.3×(4×2.5),
=0.3×10,
=3;
(2)3.14×78+31.4×2.2,
=3.14×78+3.14×22,
=3.14×(78+22),
=3.14×100,
=314.
|
(1)1.2×2.5,
=0.3×(4×2.5),
=0.3×10,
=3;
(2)3.14×78+31.4×2.2,
=3.14×78+3.14×22,
=3.14×(78+22),
=3.14×100,
=314.