题目内容
【题目】用简便方法计算:
(1)4.45+0.63+5.55 (2) 6.58-(2.58+0.9) (3)7.23+6.84-0.84+2.77
【答案】(1)10.63(2)3.1(3)16
【解析】
(1)4.45+0.63+5.55
=4.45+5.55+0.63
=10+0.63
=10.63
(2) 6.58-(2.58+0.9)
=6.58-2.58-0.9
=4-0.9
=3.1
(3)7.23+6.84-0.84+2.77
=(7.23+2.77)+(6.84-0.84)
=10+6
=16
练习册系列答案
相关题目