Question

直接寫出得數(shù)． 1÷0.25=	24 16 17 ÷8=	1 4 ÷25%× 1 8 =	1÷5+ 4 5 =
0.001×3060=	3 10 ÷ 3 8 =	7 33 × 11 14 =	1 6 ×42=
1 3 - 1 4 =	1 5 + 1 6 =	7.95-0.73-0.27=	0.5×20=

Answer 1

考點(diǎn)：分?jǐn)?shù)的四則混合運(yùn)算,分?jǐn)?shù)的加法和減法,分?jǐn)?shù)除法,小數(shù)乘法,小數(shù)除法

專題：計(jì)算題

分析：（1）把小數(shù)化為分?jǐn)?shù)計(jì)算簡(jiǎn)便；（2）把帶分?jǐn)?shù)化為整數(shù)+分?jǐn)?shù)的形式，運(yùn)用除法的運(yùn)算性質(zhì)簡(jiǎn)算；（3）把百分?jǐn)?shù)化為分?jǐn)?shù)計(jì)算；（4）把除法化為分?jǐn)?shù)，再計(jì)算；（5）把整數(shù)部分的小數(shù)點(diǎn)向左移動(dòng)三位即可；（6）把除法變?yōu)槌朔�，約分計(jì)算；（7）（8）約分計(jì)算；（9）（10）通分計(jì)算；（11）運(yùn)用減法的性質(zhì)簡(jiǎn)算；（12）先計(jì)算5×20=100，再根據(jù)小數(shù)點(diǎn)的位數(shù)，點(diǎn)上小數(shù)點(diǎn)．

解答：

解：1÷0.25=4	24 16 17 ÷8=3 2 17	1 4 ÷25%× 1 8 = 1 8	1÷5+ 4 5 =1
0.001×3060=3.06	3 10 ÷ 3 8 = 4 5	7 33 × 11 14 = 1 6	1 6 ×42=7
1 3 - 1 4 = 1 12	1 5 + 1 6 = 11 30	7.95-0.73-0.27=6.95	0.5×20=10

點(diǎn)評(píng)：此題考查了小數(shù)的、分?jǐn)?shù)、百分?jǐn)?shù)的計(jì)算，通過數(shù)字轉(zhuǎn)化、運(yùn)算技巧等進(jìn)行解答．