能简算要简算的题 计算下面各题(能简算的要简算) 0.75×1.3+75%×8.7 3.2×25×12.5.
计算下面各题(能简算的要简算) 0.75×1.3+75%×8.7 3.2×25×12.5.
计算下面各题(能简算的要简算) 0.75×1.3+75%×8.7 3.2×25×12.5.
(1)0.75×1.3+75%×8.7,
=0.75×1.3+0.75×8.7,
=0.75×(1.3+8.7),
=0.75×10,
=7.5;
(2)3.2×25×12.5,
=0.4×8×25×1.25,
=(0.4×25)×(8×12.5),
=10×100,
=1000.
计算下面各题,能简算的要简算.10.6-(6.6+0.125÷12.5%)36÷[(8.7-
(1)10.6-(6.6+0.125÷12.5%)
=10.6-(6.6+0.125÷0.125)
=10.6-(6.6+1)
=10.6-7.6
=3
(2)36÷[(8.7-3.3)×3]
=36÷[5.4×3]
=36÷3÷5.4
=12÷5.4
=
(3)3.6×
3 8+7.4×0.375
=3.6×
+7.4×
3 8=(3.6+7.4)×
3 8=11×
3 8=
33 8计算下面各题,能简算的要简算.5.95÷(1.2+0.5)×5 75÷(0.75×4)
(1)5.95÷(1.2+0.5)×5,
=5.95÷1.7×5,
=3.5×5,
=17.5;
(2)75÷(0.75×4),
=75÷3,
=25;
(3)0.8×0.68×125
=(0.8×125 )×0.68,
=100×0.68,
=68;
(4)73.5×0.1+7.35×9,
=7.35×1+7.35×9,
=7.35×(1+9),
=7.35×10,
=73.5;
计算下面各题,能简算的要简算.5.95÷(1.2+0.5)×5 75÷(0.75×4) 0
(1)5.95÷(1.2+0.5)×5,=5.95÷1.7×5,
=3.5×5,
=17.5;(2)75÷(0.75×4),
=75÷3,
=25;
(3)0.8×0.68×125
=(0.8×125)×0.68,
=100×0.68,
=68;
(4)73.5×0.1+7.35×9,
=7.35×1+7.35×9,
=7.35×(1+9),
=7.35×10,
=73.5;
计算下面各题,能简算的要简算.(1)12.5×19.95×0.4 &nb...
(1)12.5×19.95×0.4,
=12.5×0.4×19.95,
=5×19.55,
=97.75;
(2)
2 3÷[(1?
1 2)÷
1 4],
=
÷[
1 2÷
1 4],
=
÷2,
=
.
计算下面各题(能简算的要简算).①4×0.8×2.5×12.5 &nbs...
①4×0.8×2.5×12.5,
=(4×2.5)×(0.8×12.5),
=10×10,
=100;
②
2 15÷[1-(
1 5+
1 3)],
=
÷[1-
8 15],
=
÷
7 15,
=
;
③(2.8+3.85÷3.5)×4.6,
=(2.8+1.1)×4.6,
=3.9×4.6,
=17.94;
④6.5×1.83+0.17×6.5,
=6.5×(1.83+0.17),
=6.5×2,
=13;
⑤(
5 8+
2 27)×8+
11 27,
=
×8+
2 27×8+
11 27,
=5+
+
11 27,
=2+(
+
11 27),
=2+1,
=3;
⑥
9 20÷[

3 2
×(0.4+
4 5)],
=
÷[
3 2×
6 5],
=
÷
9 5,
=
.
计算下面各题,能简算的要简算.(1)2300-450÷18×18 (2)0.8×1.6+8×0.84 (3)2.5×32×12.5.
(1)2300-450÷18×18,
=2300-450×(18÷18),
=2300-450×1,
=2300-450,
=1850;
(2)0.8×1.6+8×0.84,
=8×0.16+8×0.84,
=8×(0.16+0.84),
=8×1,
=8;
(3)2.5×32×12.5,
=2.5×4×8×12.5,
=(2.5×4)×(8×1.25),
=10×10,
=100.
计算下面各题,能简算的要简算.2.5×3.2×1.251.84÷2.3×0.242.4×3
(1)2.5×3.2×1.25
=2.5×4×0.8×1.25
=(2.5×4)×(0.8×1.25)
=10×1
=10;
(2)1.84÷2.3×0.24
=0.8×0.24
=0.129;
(3)2.4×3.5+6.5÷1.3
=84+5
=89;
(4)8.56×2.5+1.44×2.5
=(8.56+1.44)×2.5
=10×2.5
=25.
计算下面各题,能简算的要简算)9.2÷25%+0.4×8 &...
(1)9.2÷25%+0.4×8
=36.8+3.2
=40;
(2)1
÷(1
7 8-
3 4)
=
×
8 9=
5 3;
(3)1-
1 2-
1 6-
1 12-
1 20-
1 30=1-
1 2-(
1 2-
1 3)-(
1 3-
1 4)-(
1 4-
1 5)-(
1 5-
1 6)
=1-
-
1 2+
1 3-
1 3+
1 4-
1 4+
1 5-
1 5+
1 6=
1 6;
(4)(3.47+3.47÷
1 3)×2.5
=(3.47+3.47×3)×2.5
=3.47×4×2.5
=3.47×(4×2.5)
=3.47×10
=34.7.
计算下面各题,能简算的要简算.25×44 6.4...
(1)25×44
=25×4×11
=100×11
=1100;
(2)6.45-0.58-1.42
=6.45-(0.58+1.42)
=6.45-2
=4.45;
(3)12×(324-285)÷26
=12×39÷26
=468÷26
=18.
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