1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)131315?21314+5215?1114214.85-1.58×8+31.2÷1.232.25×35+2.75÷123+60%
2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)11÷0.25+0.25÷1-2.5×0.121+2+3+4+5+6+5+4+3+2+16666662322×4+24×6+
3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,(能簡便的要簡便)3.82÷0.2-0.2×2.5,2.4×1.58+6.6×1.58+1.58,0.48×6.5+5.2×0.65
4樓:匿名使用者
3.82÷0.2-0.2×2.5
=38.2÷2-0.5=19.
1-0.5=18.62.
4×1.58+6.6×1.
58+1.58
=1.58x(2.4+6.
6+1)=1.58x10=15.80.
48×6.5+5.2×0.
65=4.8×0.65+5.
2×0.65
=(4.8+5.2)×0.
65=10×0.65=6.512.
4-12.4×0.25=12.
4×(1-0.25)=12.4×3/4=3.
1×3=9.3七分之五-(七分之五-二分之一)=5/7-5/7+1/2=1/20.125×9+1÷8
=9x1/8+1x1/8=(9+1)x1/8=5/4
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