问题
解答题
简便计算:
2.37×6.3+2.37×3.7
2.5×1.25×0.32
4.4×25
2.64÷5÷0.2
3.8×10.1.
答案
(1)2.37×6.3+2.37×3.7
=(6.3+3.7)×2.37,
=10×2.37,
=23.7;
(2)2.5×1.25×0.32
=2.5×1.25××0.4×0.8,
=(2.5×0.4)×(1.25×0.8),
=1×1,
=1;
(3)4.4×25
=(4+0.4)×25,
=4×25+0.4×25,
=100+10,
=110;
(4)2.64÷5÷0.2
=2.64÷(5×0.2),
=2.64÷1,
=2.64;
(5)3.8×10.1
=3.8×(10+0.1),
=3.8×10+3.8×0.1,
=38+0.38,
=38.38.