问题
解答题
能简算的要简算
0.4×(0.25+2.5)
3.3×2.8+5.7×2.8+2.8
12.5×2.5×4×8
2.05÷0.82+33.6.
答案
(1)0.4×(0.25+2.5)
=0.4×0.25+0.4×2.5
=0.1+1
=1.1;
(2)3.3×2.8+5.7×2.8+2.8
=(3.3+5.7+1)×2.8
=10×2.8
=28;
(3)12.5×2.5×4×8
=(12.5×8)×(2.5×4)
=100×10
=1000;
(4)2.05÷0.82+33.6
=2.5+33.6
=36.1.