35 + 24 + 15 + 16 = 90
35 + 24 + 15 + 16 = 59 +15 +16
= 74 +16
= 90
( 24 + 16 ) + ( 35 + 15 ) = 90
( 35 + 24 ) + ( 15 + 16 ) = 90
35+24+15+16
=(35+15)+(24+16)
= 50 + 40
= 90
hok tốt
35 + 24 + 15 + 16 = 90
35 + 24 + 15 + 16 = 59 +15 +16
= 74 +16
= 90
( 24 + 16 ) + ( 35 + 15 ) = 90
( 35 + 24 ) + ( 15 + 16 ) = 90
35+24+15+16
=(35+15)+(24+16)
= 50 + 40
= 90
hok tốt
15 + 16 + 19 = ?
25 + 35 + 45 = ?
15 + 24 = ?
22 + 23 = ?
16 + 28 =?
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50+51+52+53+54+56+57+58+59+60+61+62+63+64+65+66+67+68+69+70=?
Tìm x:
a) x − 3 = 9
b) x − 8 = 16
c) x − 20 = 35
d) x − 5 = 17
c) x − 15 = 27
g) x − 36 = 36
4 : 4 = ?
8 : 4 = ?
12 : 4 = ?
16 : 4 = ?
20 : 4 = ?
24 : 4 = ?
28 : 4 = ?
32 : 4 = ?
36 : 4 = ?
40 : 4 = ?
5 : 5 = ?
10 : 5 = ?
15 : 5 = ?
20 : 5 = ?
25 : 5 = ?
30 : 5 = ?
35 : 5 = ?
40 : 5 = ?
45 : 5 = ?
50 : 5 = ?
Số nào trừ đi 15 rồi cộng với 24 rồi chia cho 9 thì được kết quả là 16.
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26
Giúp giải bài toán nhanh:
Bài 1: 31-32+33-34+35-36+37
Bài 2: 12-13+14-15+16-17+18
28+27+26+25+24+23+22+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1+=....................................................?