问题
解答题
脱式计算,能简算的要简算. (1)475+660÷33×25 (2)400-14
(3)(
(4)5.84×1.36+1.36×3.16+1.36 (5)[1.9-6÷(2.4×5)]÷(14×0.2) (6)[(
|
答案
(1)475+660÷33×25
=475+20×25
=475+500
=975;
(2)400-14
-8513 27 14 27
=400-(14
+8513 27
)14 27
=400-100
=300;
(3)(
+5 9
-7 18
)×3611 12
=
×36+5 9
×36-7 18
×3611 12
=20+14-33
=1;
(4)5.84×1.36+1.36×3.16+1.36,
=(5.84+3.16+1)×1.36,
=10×1.36,
=13.6;
(5)[1.9-6÷(2.4×5)]÷(14×0.2)
=[1.9-6÷12]÷2.8
=[1.9-0.5]÷2.8
=1.4÷2.8
=0.5;
(6)[(
+8 9
)×4 3
-3 4
]÷1 4
×1 12
-3 4
]÷1 4 1 12
=[
×20 9
-3 4
]÷1 4 1 12
=[
-5 3
]÷1 4 1 12
=
×1217 12
=17.