五年级脱式计算简便运算的题 脱式计算下面各题(能简算的要用简便方法计算,并写出简算过程). 450÷18×25+173. 670+65÷
脱式计算下面各题(能简算的要用简便方法计算,并写出简算过程). 450÷18×25+173. 670+65÷
脱式计算下面各题(能简算的要用简便方法计算,并写出简算过程). 450÷18×25+173. 670+65÷
(1)450÷18×25+173,
=25×25+173,
=625+173,
=798;
(2)670+65÷3×
3 5,
=670+65×(
×
3 5),
=670+65×
,
=670+13,
=683;
(3)
5 8-
1 6×
4 5+57,
=
-
2 15+57,
=
+57,
=57
;
(4)38-12×6÷16,
=38-72÷16,
=38-4.5,
=33.5.
脱式计算下面各题(能简算的要用简便方法计算,并写出简算过程). (84×27-2166)÷17 115×3.
①(84×27-2166)÷17,
=(2268-2166)÷17,
=102÷17,
=6;
②
11 5×3.7+5.3÷
5 11+2.2,
=2.2×3.7+5.3×2.2+2.2,
=2.2×(3.7+5.3+1),
=2.2×10,
=22;
③(0.75÷3-0.1)×(1-
2 3),
=(0.25-0.1)×
,
=0.15×
,
=0.05.
计算下面各题,能简算的要用简便方法计算。
80-12×4÷3 = 80 - 4×(12÷3)= 80 - 4×4 = 80 - 16 = 64
60+180÷20-5 = 60 + 9 - 5 = 64
4.5-(2.68+0.86)=4.5 -(2.7-0.02+0.8+0.06)=4.5 -(3.5+0.04)= 4.5 - 3.5 - 0.04 =0.96
15.37-2.8-2.2 = 15.37 - (2.8+2.2)=15.37 - 5 = 10.37
19.92+10.35-9.92 =10.35 + (19.92 - 9.92)=10.35 + 10 = 20.35
42×4×25 = 42×(4×25)= 42 ×100 = 4200
计算下面各题,能简算的要用简便方法计算18×(56+59) ...
(1)18×(
5 6+
5 9)
=18×
+18×
5 9=15+10
=25;
(2)28.9×25+25×71.1
=(28.9+71.1)×25
=100×25
=2500;
(3)20-
2 3÷
2 54?
1 6=20-18?
1 6=2?
1 6=1
5 6;
(4)
8 15÷[(
1 2-
1 3)×
4 15]
=
÷[
1 6×
4 15]
=
÷
2 45=12.
计算下面各题(能简算的要简算,并写出简算过程)6.64+0.22+9.78+3.3675.1+24.19-75.1+24.1936900÷
(1)6.64+0.22+9.78+3.36
=(6.64+3.36)+(0.22+9.78)
=10+10
=20;

(2)75.1+24.19-75.1+24.19
=(75.1-75.1)+(24.19+24.19)
=0+48.38
=48.38;
(3)36900÷(2060-1910)+60
=36900÷150+60
=246+60
=306;
(4)248×6+274÷137
=1488+2
=1490.
计算下面各题,能简算的要写出简算过程9.9╳8.4+0.84
解: 9.9*8.4+0.84
=9.9*8.4+8.4*0.1
=(9.9+0.1)*8.4
=10*8.4
=84
计算下面各题,能简算的要写出简算过程7.85-0.4-0.54
能简算的要写出简算过程
7.85-0.46-0.54
=7.85-(0.46+0.54)
=7.85-1
=6.85
计算下面各题,能简算的要写出简算过程。(12分) ...
22.6, 31, 10 , 2.5计算下面各题,能简算的要写出简算过程0.5╳[(147-74.2)÷0.91]
=0.5x(72.8/0.91)
=0.5x80
=40
望采纳
计算下面各题,能简算的要用简便方法计算.23.4-5.7-4.3 25×50×32 &...
(1)23.4-5.7-4.3
=23.4-(5.7+4.3)
=23.4-10
=13.4
(2)25×50×32
=25×50×4×8
=(25×4)×(50×8)
=100×400
=40000
(3)99×48+48
=(99+1)×48
=100×48
=4800
(4)46×16+16×54
=16×(46+54)
=16×100
=1600
(5)65×102
=65×(100+2)
=65×100+65×2
=6500+130
=6630
(6)14.9+3.7+5.1+6.3
=(14.9+5.1)+(3.7+6.3)
=20+10
=30.