1樓:手機使用者
(1)2.5×32×12.5,
=2.5×4×8×12.5,
=(2.5×4)×(8×12.5),
=10×100,
=1000;
內(2)624÷
容[(152-139)×2],
=624÷[13×2],
=624÷26,
=24;
(3)2.23+8.45+7.77,
=2.23+7.77+8.45,
=10+8.45,
=18.45.
脫式計算,能簡算的要簡算.(1)2.5×32×12.5(2)624÷[(152-139)×2
2樓:窩窩軍團
(du1)2.5×32×12.5,
=2.5×4×8×12.5,
=(2.5×4)×zhi(8×12.5),dao=10×100,
=1000;
專(2)624÷屬[(152-139)×2],=624÷[13×2],
=624÷26,
=24;
(3)2.23+8.45+7.77,
=2.23+7.77+8.45,
=10+8.45,
=18.45.
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.(能簡算的要簡算)11÷0.25+0.25÷1-2.5×0.121+2+3+4+5+6+5+4+3+2+16666662322×4+24×6+
4樓:度鍍
11÷0.25+0.25÷1-2.5×0.1,=4+0.25-0.25,
=4+(0.25-0.25),
=4+0,
=4;21+2+3+4+5+6+5+4+3+2+16666662
,=36
6666662
,=18×2
3333331×2
,=18
3333331;32
2×4+2
4×6+2
6×8+2
8×10
+210×12,=1
2-14+1
4-16+1
6-18+1
8-110+1
10-112,
=12-112,=5
12;41÷(1-0.99)-99÷(1-0.999),=1÷0.01-99÷0.001,
=100-99000,
=-98900.
脫式計算(能簡算要簡算)?
5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
6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
7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。 5/6-1/12+1/4-5/12
8樓:瀛洲煙雨
脫式計算,能簡算的要簡算。
5/6-1/12+1/4-5/12
=10/12-1/12+3/12-5/12=9/12+3/12-5/12
=12/12-5/12
=7/12
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