问题
解答题
脱式计算.(能简算的要简算)
15-8.13-1.87
5.14+3.225-6.302
3.95+5.36-1.95
13.67-(5.45+3.67)
答案
①15-8.13-1.87,
=15-(8.13+1.87),
=15-10,
=5;
②5.14+3.225-6.302,
=8.365-6.302,
=2.063;
③3.95+5.36-1.95,
=(3.95-1.95)+5.36,
=2+5.36,
=7.36;
④13.67-(5.45+3.67),
=13.67-3.67-5.45,
=10-5.45,
=4.55.