下面各题怎样简便就怎样计算①5.02-1.37-2.63②[35-(23-14)÷56]÷110③11×2+12×3+13×4+14×5+…++199×100.-数学
题文
下面各题怎样简便就怎样计算 ①5.02-1.37-2.63 ②[
③
|
答案
(1)5.02-1.37-2.63, =5.02-(1.37+2.63), =5.02-4, =1.02; (2)[
=[
=[
=
=1; (3)
|
题文
下面各题怎样简便就怎样计算 ①5.02-1.37-2.63 ②[
③
|
答案
(1)5.02-1.37-2.63, =5.02-(1.37+2.63), =5.02-4, =1.02; (2)[
=[
=[
=
=1; (3)
|