a) 2600 + X : 4 = 3845 X : 4 =3845-2600 X : 4 =1245 X = 1245x4 X = 4980 b) X x 3 +1200 =3600 X x 3 =3600-1200 X x 3 =2400 X =2400:3 X =600
a) 2600 + X : 4 = 3845 X : 4 =3845-2600 X : 4 =1245 X = 1245x4 X = 4980 b) X x 3 +1200 =3600 X x 3 =3600-1200 X x 3 =2400 X =2400:3 X =600
Tìm X:
a) 2600 + X : 4 = 3845
b) X x 3 + 1200 = 3600
Tìm x biết (2600 + x) : 4= 3845
2600+x:4=3845
2600 + x : 4 =3845
2600 + X : 4 = 3845 bằng bao nhiêu ????
y x 10 + y x 6 + y x 4 = 1200
y x 5 + y x 9 + y x 6 = 1200
Tính nhẩm:
a) 2 x 2 = ...... 3 x 3 = ......
2 x 4 = ...... 3 x 5 = ......
2 x 6 = ...... 3 x 7 = ......
2 x 8 = ...... 3 x 9 = ......
4 x 4 = ...... 5 x 5 = ......
4 x 2 = ...... 5 x 7 = ......
4 x 6 = ...... 5 x 9 = ......
4 x 8 = ...... 5 x 3 = ......
b) 200 x 4 = ...... 300 x 2 = ......
200 x 2 = ...... 300 x 3 = ......
400 x 2 = ...... 500 x 1 = ......
100 x 4 = ...... 100 x 3 = ......
Điền > < =
a) 3 x 5 ..... 3 x 6
3 x 5 ..... 3x 4
b) 3 x 5 ..... 5 x 3
4 x 6 ..... 6 x 4
c) 20 : 4 ..... 20 : 5
20 : 4 ..... 20 : 2