27 + 27 + 27 + 27 + 27
= 27 x 5
= 135
6 + 6 + 6 + 6 + 6 + 6 + 6
= 6 x 7
= 42
4 + 4 + 4
= 4 x 3
= 12
5 + 5
= 5 x 2
= 10
27 x 5 = 135
6 x 7= 42
4 x 3 = 12
5 x 2 = 10
~ HOK TỐT ~
27 x 5
6 x 7
4 x3
5 x 2
27 + 27 + 27 + 27 + 27
= 27 x 5
= 135
6 + 6 + 6 + 6 + 6 + 6 + 6
= 6 x 7
= 42
4 + 4 + 4
= 4 x 3
= 12
5 + 5
= 5 x 2
= 10
27 x 5 = 135
6 x 7= 42
4 x 3 = 12
5 x 2 = 10
~ HOK TỐT ~
27 x 5
6 x 7
4 x3
5 x 2
27+45+1+6+9+5+4+8
Tính:
6 + 7 = ..... 7 + 8 = .....
8 + 9 = ..... 17 + 6 = .....
28 + 7 = ..... 39 + 8 = .....
30 + 4 = ..... 60 + 6 = .....
8 + 50 = ..... 5 + 16 = .....
4 + 27 = ..... 5 + 38 = .....
Điền dấu >, <, = vào ô trống
45 + 27 ... 48 +23
38 +8 ... 50 - 10
9 + 6 - 3 ... 14
45 ... 40 +10
Tính:
5 × 7 + 27 = … 5 × 9 – 18 = …
24 : 3 × 5 = … 6 : 3 × 5 = …
Nam nay ban Trang tron 6 tuoi ,me Trang tron 27 tuoi ,bo Trang cuoi me Trang luc 21 tuoi ,hoi Trang 6 tuoi ,me 27 tuoi, bo Trang bao nhieu tuoi?
hãy tính nhanh:
A.1+2+3+4+5+6+7+8+9+10+11+12+13-14=?
B.30-29+28-27+26-25+24-23+22-21...+12-11+10-9+8-7+6-5+4-3+2-1=?
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=?
1+1=? 6+6=? 6x6=? 5:5=? 6x7=? 9:9=? 60-27=? 80-70=? 100-60=?