1樓:褲兜最棒
(1)9.06-2.68-0.32,
=9.06-(2.68+0.32),
=9.06-3,
=6.06;
(2)(3.06÷0.25+2.76)×
0.2,
=(12.24+2.76)×0.2,
=15×0.2,
=3;(3)18-(3
5+4÷25),
=18-(0.6+4×52),
=18-(0.6+10),
=18-10.6,
=7.4;
(4)2.7×1.25+5.3×125%,=2.7×1.25+5.3×1.25,
=(2.7+5.3)×1.25,
=8×1.25,
=10.
計算下面各題,能簡算的要簡算,並寫出主要的計算過程
2樓:小勝k坼
①dao7.8-8.75+2.2-1.25=(版7.8+2.2)權-(8.75+1.25)=10-10
=0②13.2÷(9.4-5)+5.32
=13.2÷4.4+5.32
=3+5.32
=8.32
③7-37-4
7=7-(37+4
7)=7-1
=6④13
17-(5
17+1
10)=1317
-517
-110
=817
-110
=63170⑤15
+(56
-1318)=1
5+(15
18-1318)
=15+19
=1445
計算下面各題,能簡算的要簡算.9.5×1.06-2.52÷2.43.4×0.26+0.74×3.4 1.25×32×0.87.09×99+7.0968.
3樓:手機使用者
(1)9.5×1.06-2.52÷2.4
=10.07-1.05
=9.02;
(2)3.4×0.26+0.74×3.4
=3.4×(0.26+0.74)
=3.4×1
=3.4;
(3)1.25×32×0.8
=(1.25×0.8)×32
=1×32
=32;
(4)7.09×99+7.09
=7.09×(99+1)
=7.09×100
=709;
(5)68.5+31.5÷(0.29+0.41)=68.5+31.5÷0.7
=68.5+45
=113.5;
(6)0.4×5÷0.4×5
=2÷0.4×5
=5×5
=25.
一、計算下面各題,能簡算的要簡算。⑴1/5-2/9×3/10 = = = =
4樓:匿名使用者
可以用簡便方法,先把五分之一變成2/10,在與3/10提取1/10.這樣就可以用簡便方法計算了,下面通過**分析這道題。
5樓:流星雨中的野鶴
你好,很高興為你解答!
1/5-2/9×3/10
=1/5-1/3×1/5
=1/5×(1-1/3)
=1/5×2/3
=2/15
6樓:匿名使用者
1/5-2/9×3/10
=1/5-1/15
=3/15-1/15
=2/15
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+
7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)3.8x4.2+38x0.58 (2)36[(5/6-2/3
8樓:樂為人師
(1)3.8x4.2+38x0.58
=38x0.42+38x0.58
=38x(0.42+0.58)
=38x1
=38(2)36×[(5/6-2/3)x3]=36×[1/6x3]
=36×1/2
=18(3)1.25x32x2.5
=(1.25x8)x(4x2.5)
=10x10
=100
(4)72000÷125÷8
=72000÷(125x8)
=72000÷1000=72
9樓:匿名使用者
38×(0.42+0.58)=3.8
181.25×4×(8×2.5)=20
72000÷(125×8)=72
計算下面各題,能簡算的要簡算. 8.5×(2.36+2.42)÷0.25 3.9÷1.3×6 4.25×6.3+3.7×4.25 2
10樓:手機使用者
(du1)8.5×
zhi(2.36+2.42)÷0.25,
=8.5×4.78÷0.25,
=40.63÷0.25,
=162.52;
dao(2)3.9÷1.3×6,
=3×6,
=18;
(3)4.25×6.3+3.7×4.25,=4.25×(6.3+3.7),
=4.25×10,
=42.5;
(4)205×99,
=205×(100-1),
=205×100-205×1,
=20500-205,
=20295;
(5)25.6-7.49-2.51,
=25.6-(7.49+2.51),
=25.6-10,
=15.6;
(6)2.5-(6.8-4.9)×0.8,=2.5-1.9×0.8,
=2.5-1.52,
=0.98.
計算下面各題,能簡算的要簡算。
11樓:回憶的沙漏
(2/3-1/4+5/12)×32
=2/3×32-1/4×32+5/12×32=21又1/3-8+13又1/3
=13又1/3+13又1/3
=26又2/3
7.05*30+65*0.75-0.75
=0.75*300+65*0.75-0.75*1=0.75*(300+65-1)
=0.75*364
=259.5
1-(5/7+3/14÷3/4)*2/7
=1-(5/7+2/7)*2/7
=1-1*2/7
=1-2/7
=5/7
【數學愛好者、數學之美2和語數外物化的團員回憶的沙漏038為你解答】【有什麼不明白可以對該題繼續追問】
【如果滿意,請及時選為滿意答案,謝謝!】
12樓:科幻怪怪
1):(2/3-1/4+5/12)x32
=(8-3+5)/12x32
=10/12x32
=80/3
=26又2/3
2):7.05x30+65x0.
75-0.75=211.5+0.
75(65-1) 提取公因式0.75=211.5+0.
75x4/3x64x3/4=211.5+48
=259.5
3):1-(5/7+3/14除3/4)x2/7,除的兩邊都可以消去分子的3,分母消去一半,即乘1/2,
=1-(5/7+1/7除1/2)x2/7 可以口算
=1-(5/7+2/7)x2/7
=1-2/7
5/7。
13樓:王佩鑾
1)、3分之2-4分之1+12分之5)×32=2/3-1/4+5/12
=8/12-3/12+5/12(通分)
=(8-3+5)/12(分子相加減)
=10/12(約分)
=5/6
2)7.05×30+65×0.75-0.75=211.5+48.75-0.75
=211.5+48
=259.5
3)1-(7分之5+14分之3÷4分之3)×7分之2=1-(5/7+3/14*4/3)*2/7=1-(5/7+2/7)*2/7
=1-7/7*2/7
=1-2/7
=5/7
計算下面各題,能簡算的要簡算
31.9 18 8 31.9,31.9 18 8 31.9 10,319 21 13 2 5 911,21 11 15 911,21 15 11 119,35 2 3 215 45,23 45 2 15 45,30 6,36 1 1 100 70 27,1 7 10 27,310 72 2120 1...
計算下面各題。能簡算的要簡算
15 2 3 3 5 15 2 3 15 3 5 10 9 19 5 6 1 8 5 12 3 7 5 6 13 24 3 7 7 24 3 7 1 8 計算下面各題,能簡便計算的要簡便計算。3 5 3 4 5 6 8 9 2 7 5 7 15 8 3 4 1 4 3 5 3 4 5 6 8 9 2...
計算下面各題,能簡算的要簡算
1 7 125 8 7 125 8 7 1000 7000 2 120 20 2 45 120 40 45 80 45 125 3 35 32 128 32 35 32 4 35 36 1260 4 43 36 36 57 43 57 36 100 36 3600 5 640 4 16 8 640 ...