20 x 20
3 x 97
35 x 8
95 x 10
37 x 9
970 x 2
300 : 80
900 : 300
rút gọn phân số
5/10; 9/72; 75/300; 15/35; /4/100;23/46
x : 10 = 300 : 2
Tính :
100 x 96 =
300 x 28 =
336 x 76 =
( 9 x 325 ) - 6 : 3 =
tính nhanh
a) 2/300+6/300+10/300+...+202/300+206/300
b) 24x36+24x64/12x135-12x35
1.Tính nhẩm:
a) 27 x 10=... 1977 x 100= 14 x 1000=
86 x 10=... 103 x 100= 452 x 1000=
358 x 10=... 72 x 100= 300 x 1000=
b) 80:10= 95 x 1000=
300:10= 66 x 100=
2000:10= 78 x 10=
50/150=
5/20=
8/32=?
8/12=
4/6
12/8
15/25
11/22
36/10
75/300
4/100
9/72
5/10
15/35
10/15
9/27
300 + 300 + 300 + 100 = ?
90 + 10 + 900 = ?