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25乘14用简便计算 简便计算 14.35+3.9
简便计算 14.35+3.9 简便计算 14.35+3.9 (1)14.35+3.98+2.65=14.35+2.65+3.98=17+3.98=20.98;(2)12.5-8.14-1.86=12.
简便计算 14.35+3.9
简便计算 14.35+3.9
(1)14.35+3.98+2.65=14.35+2.65+3.98
=17+3.98
=20.98;(2)12.5-8.14-1.86
=12.5-(8.14+1.86)
=12.5-10
=2.5;
(3)23.1-(12.1-2.46)
=23.1-12.1+2.46
=11+2.46
=13.46;

(4)125×56
=125×8×7
=1000×7
=7000;
(5)56×75+44×75
=(56+44)×75
=100×75
=7500;
(6)101×43-43
=(101-1)×43
=100×43
=4300.
[24-(9.65+14.35)]÷2.7 简便计算
=(24-24)÷2.7
=0÷2.7
=0
3.9×10.2简便计算
3.9×10.2
=3.9x(10+0.2)
=3.9x10+3.9x0.2
=39+0.78
=39.78
3.9×1.02=3.9*1+3.9*0.02=3.9+0.078=3.978
3.9*0.16简便计算
3.9x0.16
=4x0.16-0.16
=0.64-0.16
=0.48
3.9 0.4-3.9 0.4简便计算
3.9+0.4-3.9+0.4
=(3.9-3.9)+(0.4+0.4)
=0+0.8
=0.8
6.8-3.9 2.2 3.9简便计算
6.8-3.9+2.2+3.9
=(6.8+2.2)+(3.9-3.9)
=9+0
=9
1.8+3.9-1.8+3.9简便计算
=(1.8-1.8)+(3.9+3.9)
=7.8
3.9×5.6-4.6-3.9简便计算
3.9×5.6-4.6×3.9
=3.9×(5.6-4.6)
=3.9×1
=3.9
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