1樓:yuy87帝把
(1)13.7×0.125×8,
=13.7×(0.125×8),
=13.7×1,
=13.7;
(2)0.8×[13-(3.12+5.28)],=0.8×[13-8.4],
=0.8×4.6,
=3.68;
(3)102×0.56,
=(100+2)×0.56,
=100×0.56+2×0.56,
=56+1.12,
=57.12;
(4)1.53×1.7+0.47×1.7,=(1.53+0.47)×1.7,
=2×1.7,
=3.4.
脫式計算,寫出主要計算過程,能用簡便演算法的要用簡便演算法. ①12× 3 8 ÷ 3 4
2樓:貓武士創作
①12×
bai3 8
÷du3 4
=12×3 8
×4 3
=6;②4 9
+5 9
×9=4 9
+5=54 9
;③14÷(
zhidao1 3
+5 6
)×3 4
=14÷7 6
×3 4
=14×6 7
×3 4
=9;④3.6-2.8+16.4-7.2
=(3.6+16.4)-(2.8+7.2)=20-10
=10;
⑤77×4 5
+23×0.8
=(77+23)×0.8
=100×0.8
=80.
用遞等式計算,能簡算的要簡算.(18%)(1)25×12-850÷17(2)(3.2÷16+10.8)÷22(3)3.2×12.5×2
3樓:匿名使用者
(du1)25×zhi12-850÷
dao17
=25×4×3-50,
=300-50,
=250;
(2)(3.2÷16+10.8)÷22
=(0.2+10.8)÷22,
=11÷22,
=0.5;
(3)3.2×12.5×2.5
=0.8×4×12.5×2.5,
=(12.5×0.8)×(2.5×4),
=10×10,
=100;
(4)7.05-3.84-0.16-1.05=7.05-1.05-(3.84+0.16),=6-4,
=2;(5)8
17×9-8÷17 8
=817
×9-8×8
17,=(9-8)×8
17,=1×8
17,=8
17;(6)5 6
×[2÷(7 8
-3 4
)]=5 6
×[2÷1 8
],=5 6
×16,
=40 3.
脫式計算(能簡算要簡算)?
4樓:妙酒
3.76+4.25+5.75 +12-
3.27-0.73+ 60.
49-36+5.51,『=(4.25+5.
75)+12-(3.27+0.73)-36+(60.
49+5.51)+3.76
=10+12-4-36+66+3.76
=51.76
5樓:老任
解:1 . 3.76+4.25+5.75
=3.76+(4.25+5.75)
=3.76+10
=13.76
2. 12-3.27-0.73
=12-(3.27+0.73)
=12-4
=83. 60.49-36+5.51
=(60.49+5.51)-36
=66-36=30
6樓:原宇衛香旋
(54+9/13)÷9
36÷【
(5/6-1/3)×3】
5/7+8/7÷2
2-6/13÷9/2-2/3
=(54+9/13)×1/9
=36÷2/3
=5/7+4/7
=2-4/39-2/3
=54×1/9+9/13×1/9
=54=9/7
=2-(4/39+2/3)
=6+1/13
=48/39=16/13
=79/13或6
1/13
【3/5-(2/4-2/5)】÷4
=【3/5-1/10】÷4
=1/2÷4
=1/8
希望我答
幫助純手打辛苦~
脫式計算,能簡算的要簡算 22.3-2.45-5.3-4.55 920÷[12×(25+13)] [43.3×(2-75%)+7]×12
7樓:手機使用者
(1)22.3-2.45-5.3-4.55,=(22.3-5.3)-(2.45+4.55),=17-7,
=10;
(2)9
20÷[1
2×(25+1
3)],
=920
÷[12
×1115
],=9
20÷1130,
=2722
;(3)[43.3×(2-75%)+7]×12,=[43.3×1.25+7]×12,
=[54.125+7]×12,
=61.125×12,
=30.5625;
(4)9
20×103?9
20×3,
=920
×(103?3),
=920
×100,
=45;
(5)5
9÷5+4
9÷4,=19
+19,=2
9;(6)12?6
13÷9
26?23,
=12-43-2
3,=12-(43+2
3),=12-2,
=10.
脫式計算【可以簡便的要簡便】 (1/8-3/14+1/7)*12
8樓:匿名使用者
(1/8-3/14+1/7)*12
=(1/8-3/14+2/14)×12
=(1/8-1/14)×12
=3/2-6/7
=21/14-12/14
=9/14
9樓:
(1/8-3/14+1/7)*12
=(1/8-1/14)x12
=(14/112-8/112)x12
=6/112x12
=9/14
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