1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.(能簡算的要簡算)①1÷0.25+0.25÷1-2.5×0.1② 1+2+3+4+5+6+5+4+3+2+1 6666662
2樓:手機使用者
①1÷0.25+0.25÷1-2.5×0.1,=4+0.25-0.25,
=4+(62616964757a686964616fe78988e69d83313333353336660.25-0.25),
=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
+24×6
+26×8
+28×10
+210×12
,=1 2
-1 4
+1 4
-1 6
+1 6
-1 8
+1 8
-110
+110
-112
,=1 2
-112
,=512
;④1÷(1-0.99)-99÷(1-0.999),=1÷0.01-99÷0.001,
=100-99000,
=-98900.
脫式計算.(能簡算的要簡算) ①1.258×18.5-0.258×18.5 ②8.48÷0
3樓:薔薇騎士
①bai1.258×
du18.5-0.258×18.5,
zhi=18.5×(1.258-0.258),=18.5×1,
=18.5;dao
②8.48÷內0.8×0.9,
=10.6×0.9,
=9.54;
③1.25×2.4,
=1.25×8×0.3,
=10×0.3,
=3;④容5.85÷(1.3+0.5)×6,=5.85÷1.8×6,
=3.25×6,
=19.5.
脫式計算(能簡算的要簡算
4樓:手機使用者
(1)zhi2.86×0.25+2.86×0.48=0.715+1.3728
=2.0878;
(dao2)9.5÷
內[(1-0.5)÷0.1]
=9.5÷[0.95÷0.1]
=9.5÷9.5
=1;(3)0.77÷35=0.022;
(4)4×12-3x=42
4×12-3x+3x=42+3x
48=42+3x
3x=48-32
3x=6
x=2.容
脫式計算.(能簡算的就簡算)9.4÷[(1.2+1.3)÷0.25](1.2+1.8
5樓:祈兒路過
(du1)9.4÷zhi[(1.2+1.3)÷0.25]=9.4÷[2.5÷0.25]
=9.4÷10
=0.94
(dao2)(1.2+1.8×
內4)×(容7-6.75
=(1.2+7.2)×0.25
=8.4×0.25
=2.1
(3)2.65×1.7+13.5×0.17=2.65×1.7+1.35×1.7
=(2.65+1.35)×1.7
=4×1.7
=6.8
(4)20.4-0.8×0.4-0.68
=20.4-0.32-0.68
=20.4-(0.32+0.68)
=20.4-1
=19.4
脫式計算(能簡算的要簡算)①31315?21314+5215?1114②14.85-1.58×8+31.2÷1.2③2.25×35+2.75÷123+60%
6樓:打鐵王
①313
15-213
14+52
15-1114,
du=(313
15+52
15)-(213
14+11
14),
=9-4,
=5;②14.85-1.58×zhi8+31.2÷1.2,=14.85-12.64+26,
=28.21;
③2.25×3
5+2.75÷12
3+60%,
=2.25×0.6+2.75×0.6+0.6,=(2.25+2.75+1)×dao0.6,=6×0.6,
=3.6;
④1000+999-998-997+996+995-994-993+…內+104+103-102-101,
=(1000+999-998-997)+(996+995-994-993)+…+(104+103-102-101),
=4+4+…+4,
=4×(容900÷4),
=900.
脫式計算.(能簡算的要簡算) 0.125×0.25×8×4 [5-1.7÷(2-1)]×1 87×386 49÷(79+49)×114
7樓:手機使用者
(1)0.125×
源0.25×8×4,
=(0.125×8)×(0.25×4),
=1×1,
=1;(2)[5-1.7÷(2-1)]×1,=[5-1.7÷1]×1,
=[5-1.7]×1,
=3.3×1,
=3.3;
(3)87×386,
=(86+1)×386,
=86×3
86+1×386,
=3+386,
=3386
;(4)4
9÷(79+4
9)×114,
=49÷119
×114,=4
11×114,
=1;(5)3.9÷1.5-2.3×0.5,=2.6-1.15,
=1.45;
(6)112÷3
4-58×1635,
=2-27,
=157.
脫式計算,能簡算的要簡算.21÷0.25÷0.43.5×0.7+5.5×0.7+0.7
8樓:汪天韻
(1)21÷0.25÷0.4,
=21÷(0.25×0.4),
=21÷0.1,
=210;版
(2)3.5×0.7+5.5×0.7+0.7,=(3.5+5.5+1)×權0.7,
=10×0.7,
=7;(3)0.125×3.2×0.25,=0.125×8×0.4×0.25,
=(0.125×8)×(0.4×0.25),=1×0.1,
=0.1;
(4)0.2×9.9+0.1,
=0.2×(10-0.1)+0.1,
=0.2×10-0.2×0.1+0.1,
=2+0.1-0.02,
=2.1-0.02,
=2.08.
請脫式計算,能簡算的要簡算4.85+3.62+1.38+5.15 [16.7-(6.2+9.5)]×8.3 3.25÷0.25+1.75÷0.25
9樓:嚼咬
(1)4.85+3.62+1.38+5.15,du=(zhi4.85+5.15)+(3.62+1.38),dao專=10+5,
=15;
(2)[16.7-(6.2+9.5)]×8.3,=[16.7-15.7]×8.3,
=1×8.3,
=8.3;
(3)3.25÷
屬0.25+1.75÷0.25,
=13+7,
=20;
(4)10.52-(3.52-1.7),
=10.52-3.52+1.7,
=7+1.7,
=8.7.
脫式計算,能簡算的要簡算,脫式計算能簡算的,要簡算25加13乘以1589乘
原式 5 9 5 9 3 8 3 8 1 3 8 3 8 9 64 1 8 5 9 3 8 2 9脫式計算過程。1 8 5 9 3 8 2 9脫式計算過程。1 8 3 8 5 9 2 9 1 4 7 9 9 36 28 36 37 36 1 8 3 8 5 9 2 9 4 8 7 9 1 2 7 9...
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1 1840 725 25 16,1840 29 16,1840 30 1 16,1840 30 16 16,1360 16,1376 2 278?8 17?917,278 817 917 27 8?1,198 238 3 16.4 3.5 83.6 166.5,16.4 83.6 3.5 166....
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