1樓:浮生若夢
(1)14×75-624÷39,
=1050-16,
=1034;
(2)(7.6-3.6÷2)×1.5,
=(7.6-1.8)×1.5,
=5.8×1.5,
=8.7;
(3)4 5
-(4 5
-1 2
),=4 5
-4 5
+1 2
,=0+1 2
,=1 2
;(4)4.68×78+4.68×22,
=4.68×(78+22),
=4.68×100,
=468.
計算下面各題,能簡算的要簡算 14×75-624÷39(7.6-3.6÷2)×1.545-(45-12)4.68×78+
2樓:奮兒
(1)14×75-624÷39,
=1050-16,
=1034;
(2)(7.6-3.6÷2)×1.5,
=(7.6-1.8)×1.5,
=5.8×1.5,
=8.7;
(3)4
5-(45-1
2),=45
-45+12
,=0+12,
=12;(4)4.68×78+4.68×22,
=4.68×(78+22),
=4.68×100,
=468.
計算下面各題,能簡算的要簡算.(1)975-384÷16×25 (2) 39 144 ÷( 5 6 +
3樓:手機使用者
(1)975-384÷16×25
=975-24×25,
=975-600,
=375;
(2)39
144÷(5 6
+1 4
)+1.65
=39 144
÷(10
12+3
12)+1.65,
-39 144
×1213
+1.65,
=1 4
+1.65,
=0.25+1.65,
=1.9;
(3)5.25+34 5
-1.8+23 4
=5.25+3.8-1.8+2.75,
=5.25+2.75+(3.8-1.8),=8+2,
=10;
(4)96
17×1.5-1.5×45
17=(96
17-45
17)×1.5,
=3×1.5,
=4.5;
(5)12.5×0.25×32
=12.5×0.25×8×4,
=(12.5×8)×(0.25×4),
=100×1,
=100;
(6)36×(5
18+2 9
)÷2%
=[36×5
18+36×2 9
]÷2%,
=[10+8]÷2%,
=18÷2%,
=900.
計算下面各題,能簡算的要簡算,並寫出主要的計算過程.①7.8-8.75+2.2-1.25②13.2÷(9.4-5)+5.32③1-
4樓:可樂
①7.8-8.75+2.2-1.25,
=(7.8+2.2)-(8.75+1.25),=10-10,
=0;②13.2÷(62616964757a686964616fe78988e69d83313333353331389.4-5)+5.32,
=13.2÷4.4+5.32,
=3+5.32,
=8.32;
③1-3 7
-4 7
,=1-(3 7
+4 7
),=1-1,
=0;④13
17-(5
17+1
10),
=13 17
-517
-1 10
,=8 17
-110
,=63
170;
⑤1 5
+(5 6
-1318
),=1 5
+(15
18-13
18) ,
=1 5
+1 9
,=1445.
計算下面各題,能簡算的要簡算。 45×(3/5+5/9) 3/14÷【6/7×(1/3+1/4)】 (7/3+7/4-7/12)×6/7
5樓:匿名使用者
45×(3/5+5/9) = 45×8/9 = 40
3/14÷【6/7×(1/3+1/4)】= 3/14÷【6/7×12/7】= 3/14÷2 = 3/28
(7/3+7/4-7/12)×6/7 = 7/3×6/7+7/4×6/7-7/12×6/7 = 2+3/2-1/2 = 3
(2/3-5/9×3/5)÷7/16 =(2/3-1/3)÷7/16 = 1/3*16/7 = 16/21
1/9×3+1/9×5+1/9 = 3/9+5/9+1/9 = 9/9 = 1
7/8×3/7+7/8 = 3/8+7/8 = 10/8 = 5/4
(1/2+11/8×3/2)÷1/2 = (1/2+11/8×3/2)×2 = 1/2×2+11/8×3/2×2 = 1 + 33/8 = 41/8
(1/3+1/5+1/15)×15 = 1/3×15 +1/5×15+1/15×15 = 5+3+1 = 9
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