a) 135+360+65+40=[135+65]+[360+40]=200+400=600
b) 463+318+137+22=[463+137]+318+22=500+340=840
c)20+21+22+ 23+24+25+26+27+28+29+30=[20+30]+[21+29]+[22+28]+[23+27]+[24+26]+25=50+50+50+50+50+25=275
HỌC TỐT NHÉ BẠN
a) 135+360+65+40=[135+65]+[360+40]=200+400=600
b) 463+318+137+22=[463+137]+318+22=500+340=840
c)20+21+22+ 23+24+25+26+27+28+29+30=[20+30]+[21+29]+[22+28]+[23+27]+[24+26]+25=50+50+50+50+50+25=275
HỌC TỐT NHÉ BẠN
tính
a) 135+360+65+40
b) 463+318+137+22
c) 20+21+22+...+29+30
tính nhanh;
a,135+360+65+40=......?
b,463+318+137+22=.....?
c,20+21+22+...+29+30=....?
tính nhanh:
a) 135+360+65+40=
b)463+318+137+22=
c)20+21+22+...+29+30=
Tính nhanh :
a) 135 + 360 + 65 + 40 .
b) 463 + 318 + 137 + 22 .
c) 20 + 21 +22 ... 29 + 30 .
Bài 31. Tính nhanh
a) 135 + 360 + 65 + 40;
b) 463 + 318 + 137 + 22;
c) 20 + 21 + 22 + ...+ 29 + 30.
tính nhanh
1) 135+360+65+40=
2) 463+318+137+22=
3) 20+21+22+...+29+30=
Tính nhanh:
a) 135 + 360 + 65 + 40
b) 463 + 318 + 137 + 22
c) 20 + 21 + 22 ... + 29 + 30
Ai nhanh mình tick cho
tinh nhanh
135+360+65+40
463+318+137+22
20+21+22+......+29+30
Tính nhanh :
135 + 360 + 65 + 40
463 + 318 + 137 + 22
20 + 21 + 22 +.....+29 + 30