简便计算(1)4.85-59+5.15-49(2)19×(434÷518-3.6+6.15×335)(3)34÷[(45+14)×37](4)116+3112+5120+7130+9142.-数学
题文
简便计算 (1)4.85-
(2)
(3)
(4)1
|
答案
(1)4.85-
=4.85+5.15-(
=10-1, =9; (2)
=
=
=
=3.96; (3)
|
题文
简便计算 (1)4.85-
(2)
(3)
(4)1
|
答案
(1)4.85-
=4.85+5.15-(
=10-1, =9; (2)
=
=
=
=3.96; (3)
|