Question

直接写出得数．

14× 5 21 =	1 2 + 1 3 =	7 9 ×18=	1 7 - 1 9 =	4.9×100=
3 16 ×12=	3 5 - 1 3 =	25×0.4=	3 8 + 1 2 =	9÷0.001=
3 4 × 4 9 =	5 8 × 4 5 =	16 25 × 5 8 =	12 13 × 13 15 =	8.05-0.5=
11 15 × 5 22 =	5 6 ×24=	3 4 ×6=	5.6÷0.2=	0.4×99+0.4=

Answer 1

考点：分数乘法,小数的加法和减法,小数乘法,小数除法

专题：计算题

分析：依据分数、小数四则运算及其混合运算的顺序进行解答即可．

解答：

解：14× 5 21 = 10 3	1 2 + 1 3 = 5 6	7 9 ×18=14	1 7 - 1 9 = 2 63	4.9×100=490
3 16 ×12= 9 4	3 5 - 1 3 = 4 15	25×0.4=10	3 8 + 1 2 = 7 8	9÷0.001=9000
3 4 × 4 9 = 1 3	5 8 × 4 5 = 1 2	16 25 × 5 8 = 2 5	12 13 × 13 15 = 4 5	8.05-0.5=7.55
11 15 × 5 22 = 1 6	5 6 ×24=20	3 4 ×6= 9 2	5.6÷0.2=28	0.4×99+0.4=40

点评：此题主要考查分数、小数四则运算，及其混合运算的顺序的灵活应用．