463 + 318 + 137 + 22 = ?
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![](https://rs.olm.vn/images/avt/0.png?1311)
463 + 318 + 137 + 22 = (463 + 137) + (318 +22) = 600 + 340 = 940
![](https://rs.olm.vn/images/avt/0.png?1311)
a)463 + 318 + 137 + 22
= 463 + 137 + 318 +22
= 600 + 340
= 940
b) \(20+21+22+...+30\)
\(=\left(20+30\right)+\left(21+29\right)+\left(22+28\right)+\left(23+27\right)+\left(24+26\right)+25\)
\(=50+50+50+50+50+25\)
\(=250+25\)
\(=275\)
\(a.463+318+137+22.\)
\(=\left(463+137\right)+\left(318+22\right)\)
\(=600+340\)
\(=940\)
\(b.20+21+22+...+29+30\)
\(=\left(20+30\right)\times11:2\)
\(=50\times11:2\)
\(=550:2\)
\(=275\)
![](https://rs.olm.vn/images/avt/0.png?1311)
463 + 318 + 137 + 22 = (463 + 137) + (318 + 22) = 600 + 340 = 940
463 + 318 + 137 + 22 = (463 + 137) + (318 + 22) = 600 + 340 = 940
![](https://rs.olm.vn/images/avt/0.png?1311)
135+360+65+40+463+318+137+22+20+21+29+30
= (135+65 ) + ( 360+40 ) + ( 463+137 ) + ( 318+22 ) + ( 21+29 ) + ( 20+30 )
= 200 + 400 + 600 + 340 + 50 + 50
= 1640
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 463 + 318 + 137 + 22
=(463 + 137) + (318 + 22)
=600 + 340
=940
nha bạn
^_^
a) 463 + 318 + 137 + 22
= (463+137) + (318+22)=600+340=940
b) 20 + 21 + 22 + 23 + ............... + 29 + 30
=( 30+20) +(21+29) +(22+28)+(23+27)+(24+26) + 25
30.5+25=150+25=175
![](https://rs.olm.vn/images/avt/0.png?1311)
1, ko ghi lại đề
=(135+65)+(360+40)
=200+400
=600
2, ko ghi lại đề
=(463+137)+(318+22)
=600+340
=940
![](https://rs.olm.vn/images/avt/0.png?1311)
a)135+360+65+40
= ( 135 + 65 ) + ( 360 + 40 )
= 200 + 400
= 600
b)463+318+137+22
= ( 463 + 137 ) + ( 318 + 22 )
= 600 + 340
= 940
![](https://rs.olm.vn/images/avt/0.png?1311)
Tính nhanh:
a) 135 + 360 + 64 + 40;
= ( 65 + 135) + ( 360 + 40)
= 200 + 400
= 600
b) 463 + 318 + 137 + 22;
= ( 463 + 137) + ( 318 + 22)
= 600 + 314
= 914
c) 20 + 21+ 22 + ... + 29 + 30.
= ( 20 + 30 ) + ( 21 + 29 ) + ( 22 + 28) + ( 23 + 27) + ( 24 + 26) + 25.
= 5. 50 + 25
= 250 + 25
= 275
a) 135 + 360 + 65 + 40 = (135 + 65) + (360 + 40) = 200 + 400 = 600.
b) 463 + 318 + 137 + 22 = (463 + 137) + (318 + 22) = 600 + 340 =940.
c) Nhận thấy 20 + 30 = 50 = 21 + 29 = 22+ 28 = 23 + 27 = 24 + 26.
Do đó 20 + 21 + 22 + ...+ 29 + 30
= (20+ 30) + (21 + 29) + (22 + 28) + (23 + 27) + (24 + 26) + 25
= 5 . 50 + 25 = 275.
![](https://rs.olm.vn/images/avt/0.png?1311)
a ) 135 + 360 + 65 + 40 = 600
b ) 463 + 318 + 137 + 22 = 940
c ) kết quả là 275
463 + 318 + 137 + 22
=(463+137)+(318+22)
=600+340
=940
463+318+137+22
=463+137+318+22
=600+340
=940