Question

直接寫出下面各題的計(jì)算結(jié)果．

6.1-2.01=	1-1÷9=	5 8 - 3 8 =	12×（ 1 4 + 1 6 ）=	4÷0.8=
1 6 ÷ 2 3 =	0.5-0.08=	7a+a=	3 5 × 1 2 =	5 16 × 8 15 =
9 16 - 5 16 =	1.25×0.7×8=	312÷3=	1.25×8=	21÷ 3 7 =
3 5 + 2 5 ÷ 1 5 =	1787-998=	10 21 × 3 5 =	1 8 ÷ 1 8 ÷ 1 8 =	5 9 × 1 5 ÷ 5 9 =

Answer 1

考點(diǎn)：小數(shù)的加法和減法,整數(shù)的除法及應(yīng)用,分?jǐn)?shù)的加法和減法,分?jǐn)?shù)乘法,分?jǐn)?shù)的四則混合運(yùn)算,用字母表示數(shù)

專題：運(yùn)算順序及法則,運(yùn)算定律及簡算

分析：根據(jù)小數(shù)、整數(shù)、分?jǐn)?shù)加減乘除的運(yùn)算方法計(jì)算即可，注意能簡算的要簡算．

解答： 解：根據(jù)分析，可得

6.1-2.01=4.09	1-1÷9= 8 9	5 8 - 3 8 = 1 4	12×（ 1 4 + 1 6 ）=5	4÷0.8=5
1 6 ÷ 2 3 = 1 4	0.5-0.08=0.42	7a+a=8a	3 5 × 1 2 = 3 10	5 16 × 8 15 = 1 6
9 16 - 5 16 = 1 4	1.25×0.7×8=7	312÷3=104	1.25×8=10	21÷ 3 7 =49
3 5 + 2 5 ÷ 1 5 =2 3 5	1787-998=789	10 21 × 3 5 = 2 7	1 8 ÷ 1 8 ÷ 1 8 =8	5 9 × 1 5 ÷ 5 9 = 1 5

點(diǎn)評：此題主要考查了根據(jù)小數(shù)、整數(shù)、分?jǐn)?shù)加減乘除的運(yùn)算方法進(jìn)行口算的能力，注意檢查．