首页 > 数学 > 题目详情
简算.(1)2.4×0.19+0.24×8.1(2)18.8×10.1-1.88(3)0.79×0.46+7.9×0.053+0.0079.
题目内容:
简算.
(1)2.4×0.19+0.24×8.1
(2)18.8×10.1-1.88
(3)0.79×0.46+7.9×0.053+0.0079.优质解答
(1)2.4×0.19+0.24×8.1,
=2.4×0.19+2.4×0.81,
=2.4×(0.19+0.81),
=2.4×1,
=2.4;
(2)18.8×10.1-1.88,
=1.88×101-1.88,
=1.88×101-1.88,
=1.88×(101-1),
=1.88×100,
=188;
(3)0.79×0.46+7.9×0.053+0.0079,
=0.0079×46+0.0079×53+0.0079,
=0.0079×(46+53+1),
=0.0079×100,
=0.79.
(1)2.4×0.19+0.24×8.1
(2)18.8×10.1-1.88
(3)0.79×0.46+7.9×0.053+0.0079.
优质解答
=2.4×0.19+2.4×0.81,
=2.4×(0.19+0.81),
=2.4×1,
=2.4;
(2)18.8×10.1-1.88,
=1.88×101-1.88,
=1.88×101-1.88,
=1.88×(101-1),
=1.88×100,
=188;
(3)0.79×0.46+7.9×0.053+0.0079,
=0.0079×46+0.0079×53+0.0079,
=0.0079×(46+53+1),
=0.0079×100,
=0.79.
本题链接: