问题
解答题
计算下面各题.(能简算的要简算)
(1)3.46+2.37+0.54+0.63
(2)50.8-(8.6+9.6×4)
(3)25-4.2×1.4+1.08
(4)8-1.26×1.5+93.89.
答案
(1)3.46+2.37+0.54+0.63
=(3.46+0.54)+(2.37+0.63)
=4+3
=7;
(2)50.8-(8.6+9.6×4)
=50.8-(8.6+38.4)
=50.8-47
=3.8;
(3)25-4.2×1.4+1.08
=25-5.88+1.08
=25-(5.88-1.08)
=25-4.8
=20.2;
(4)8-1.26×1.5+93.89
=8-1.89+93.89
=8+(93.89-1.89)
=8+92
=100.