Question

直接寫出得數(shù)． 5 7 × 14 15 =	1 9 ÷ 2 3 =
1.25×0.16×8=	2.6-1.7=
44÷ 11 10 =	6 7 × 5 9 =
2 3 × 9 4 × 1 2 =	1 2 - 1 5 =
5 8 ×16+ 1 8 ×16=	0.6+99×0.6=

Answer 1

分析：①⑥⑦約分計(jì)算；②⑤把除法改為乘法，再約分計(jì)算；③運(yùn)用乘法交換律與結(jié)合律簡算；④小數(shù)點(diǎn)對齊；⑧通分計(jì)算；⑨⑩運(yùn)用乘法分配律簡算．

解答：解：

5 7 × 14 15 = 2 3	1 9 ÷ 2 3 = 1 6
1.25×0.16×8=1.6	2.6-1.7=0.9
44÷ 11 10 =40	6 7 × 5 9 = 10 21
2 3 × 9 4 × 1 2 = 3 4	1 2 - 1 5 = 3 10
5 8 ×16+ 1 8 ×16=12	0.6+99×0.6=60．

點(diǎn)評：此題考查了分?jǐn)?shù)的約分和通分計(jì)算、小數(shù)點(diǎn)對齊、運(yùn)算定律的靈活運(yùn)用等，根據(jù)各自特點(diǎn)，進(jìn)行解答．