( 4 + 2 + 4 ) x 10
= ( 6 + 4 ) x 10
= 10 x 10
= 100
( 4 + 2 + 4 ) x 10
= 10 x 10
= 100
Ai tích mik mik tích lại!!!!!!!!
Tính nhẩm:
3 x 4 = 12 2 x 5 = 5 x 3 = 4 x 2 =
12 : 3 = 10 : 2 = 15 : 3 = 8 : 2 =
12 : 4 = 10 : 5 = 15 : 5 = 8 : 4 =
756 = 700 + 50 + ….. = 7 x 100 +……. x 10 + 6 b) 862 = …….. x 100 + …….. x 10 + 2 4 x 2 + 4 x 5 + 4 =…………………….. a x 7 + a x 2 + a =……………………. c) abc = ….. … x 100 +……… x 10 + …….
2+2+4+2+10+10+10+10=
Complete 10 Times Table.
1 10 is 10 5 10 is ... 9 10 is ...
2 10 is 20 6 10 is ... 10 10 is ...
3 10 is 30 7 10 is ... 11 10 is ...
4 10 is 40. 8 10 is ... 12 10 is ...
1+1+2+2+3+3+4+4+5+5+6+6+7+7+8+8+9+9+10+10=
(2 điểm) Tính tổng
a. x = 1+ 2+ 3+ 4 + 5 + 6 + 7 + 8 + 9 +10
b. y = 2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20
tính nhanh: 2-4+6-8+10-12+4
10 . 10 =
9 . 9 =
8 . 8 =
7 . 7 =
6 . 6 =
5 . 5 =
4 . 4 =
3 . 3 =
2 . 2 =
1 . 1 =
2 x 10 = ?
3 x 10 = ?
4 x 10 = ?
