Question

口算 56+289=	1.9+2.09=	1 3 + 1 4 =	0.3-0.03=
9+99+999+3=	35× 5 7 =	0.01÷0.2=	5 6 × 3 10 =
1 2 - 1 3 =	7.2÷9=

Answer 1

分析：根據(jù)整數(shù)加法、小數(shù)加減法、小數(shù)除法、分?jǐn)?shù)加減法和分?jǐn)?shù)減法的計算方法進(jìn)行計算即可得到答案．

解答：解：

56+289=345	1.9+2.09=3.99	1 3 + 1 4 = 7 12	0.3-0.03=0.27
9+99+999+3=1110	35× 5 7 =25	0.01÷0.2=0.05	5 6 × 3 10 = 1 4
1 2 - 1 3 = 1 6	7.2÷9=0.8

點評：此題主要考查的是整數(shù)加法、小數(shù)加減法、小數(shù)除法、分?jǐn)?shù)加減法和分?jǐn)?shù)減法的計算方法．