1楼:豪爱一萌
(1)12.7+12.5÷5
=12.7+2.5
=15.2
(2)(7.5-2.3×0.4)÷0.01=(7.5-0.92)÷0.01
=6.58÷0.01
=658
(3)2.16÷0.9÷0.3
=2.16÷(0.9×0.3)
=2.16÷0.27
=8(4)78÷0.25÷0.4
=78÷(0.25×0.4)
=78÷0.1
=780
用递等式计算.①7680-4680÷12×5 ②53×26+470×2.6 ③7.5÷(4-3.75)×4
2楼:你大爷
①7680-4680÷12×5,
=7680-390×5,
=7680-1950,
=5730;
②53×26+470×2.6,
=530×2.6+470×2.6,
=(530+470)×2.6,
=1000×2.6,
=2600;
③7.5÷(4-3.75)×4,
=7.5÷0.25×4,
=30×4,
=120;④57
÷29×1415,=5
7×92×1415,
=4514
×1415
,=3;
⑤[35
+(49-13
)]×45,
=[35+19
]×45,=15
×45+1
9×45,
=9+5,
=14.
递等式计算(能简算的要简算).(1)9.76÷3.2×1.6(2)(8+8)×12.5(3)7.5×2.
3楼:_乵
(1)9.76÷3.2×1.6,
=3.05×1.6,
=4.88;
(2)(8+8)×12.5,
=8×12.5+8×12.5,
=100+100,
=200;
(3)7.5×2.3+2.3×3.5-2.3,=2.3×(7.5+3.5-1),
=2.3×10,
=23;
(4)10.5÷(5.3-4.6)+8.9,=10.5÷0.7+8.9,
=15+8.9,
=23.9.
递等式计算.12.7+2.85+7.3
4楼:吐笔
(1)12.7+2.85+7.3+2.15=(12.7+7.3)+(2.15+2.85)=20+5
=25;
(2)0.78×6.4-0.78×5.4
=0.78×(6.4-5.4)
=0.78×1
=0.78;
(3)12.5×4.6×0.8
=12.5×0.8×4.6
=10×4.6
=46;
(4)72÷(1.84+2.96)×1.8=72÷4.8×1.8
=15×1.8
=27.
脱式计算(能简算的要简算)(12.5+7.5)÷0.25310-10×46.18÷6+
5楼:欲猫人
(1)(12.5+7.5)÷0.25
=20÷0.25
=80(2)310-10×4
=310-40
=270
(3)6.18÷6+4
=1.03+4
=5.03
(4)2÷8
5×25
4=2×5
8×25
4=125
16(5)13.1×56+5.6×69
=131×5.6+5.6×69
=(131+69)×5.6
=200×5.6
=1120
(6)2÷23-2
3÷2=2×32-2
3×12=3-1
3=223
递等式计算.12.7+2.85+7.3+2.15  ...
6楼:匿名用户
(1)12.7+2.85+7.3+2.15=(12.7+7.3)+(2.15+2.85)=20+5
=25;
(2)0.78×
6.4-0.78×5.4
=0.78×(6.4-5.4)
=0.78×1
=0.78;
(3)12.5×4.6×0.8
=12.5×0.8×4.6
=10×4.6
=46;
(4)72÷(1.84+2.96)×1.8=72÷4.8×1.8
=15×1.8
=27.
用递等式计算,能简算的要写出简算过程. (2.5×6+2.5×4)÷5 35.6-2.8+4.4-7.2 0.25×3.2×12.
7楼:最强黑客
(1)(2.5×6+2.5×4)÷5,
=2.5×(6+4)÷5,
=2.5×10÷5,
=25÷5,
=5;(2)35.6-2.8+4.4-7.2,=(35.6+4.4)-(2.8+7.2),=40-10,
=30;
(3)0.25×3.2×12.5,
=0.25×4×0.8×12.5,
=(0.25×4)×(0.8×12.5),=1×10,
=10;
(4)7.5÷(1.5+2.5),
=7.5÷4,
=1.875;
(5)0.6×(5+0.6)-1,
=0.6×5+0.6×0.6-1,
=3+0.36-1,
=3.36-1,
=2.36;
(6)3.7×1.25-3.7×0.25,=3.7×(1.25-0.25),
=3.7×1,
=3.7.
用递等式计算,能简算的要写出简算过程. (2.5×6+2.5×4)÷5 35.6-2.8+4.4-7.2 0.25×3.2
8楼:ta剋
(1)(2.5×6+2.5×4)÷5,
=2.5×(6+4)÷5,
=2.5×10÷5,
=25÷5,
=5;(2)35.6-2.8+4.4-7.2,=(35.6+4.4)-(2.8+7.2),=40-10,
=30;
(3)0.25×3.2×12.5,
=0.25×4×0.8×12.5,
=(0.25×4)×(0.8×12.5),=1×10,
=10;
(4)7.5÷(1.5+2.5),
=7.5÷4,
=1.875;
(5)0.6×(5+0.6)-1,
=0.6×5+0.6×0.6-1,
=3+0.36-1,
=3.36-1,
=2.36;
(6)3.7×1.25-3.7×0.25,=3.7×(1.25-0.25),
=3.7×1,
=3.7.
1-5÷12-7/12等于多少(脱式计算)
9楼:乐为人师
1-5÷12-7/12
=1-5/12-7/12
=1-(5/12+7/12)
=1-1=0