Các câu hỏi tương tự
4x6+16=
5x7+25=
20:4x6=
30:5:2=
40:4:5=
2x3=?
5x7=?
2x5=?
5x7=?
5x1=5
5x2=10
5x3=15
5x4=20
5x5=20
5x6=30
5x7=35
5x8=40
5x9=45
5x10=50
Tính giá trị biểu thức:
(5x7)-2(35-7)
Cho:
5x9+17=x.
5x7+30=y.
5x5+38=z.
Hãy sắp xếp x,y,z theo thứ tự tăng dần.
hãy làm theo 2 cách
5x7+15=
4x9+25=
4x8-12=
2x8=
3x9=
4x5=
5x6=
20x4=
30x3=
12:2=
12:3=
2x9=
5x7=
90:3=
40:2=
18:3=
30x2=
tính nhẩm: 2x1 3x1 4x1 5x1 2:2 3:3 4:4 5:5 2x2 3x2 4x2 5x2 4:2 6:3 8:4 10:5 2x3 3x3 4x3 5x3 6:2 9:3 12:4 15:5 2x4 3x4 4x4 5x4 8:2 12:3 16:4 20:5 2x5 3x5 4x5 5x5 10:2 15:3 20:4 25:5 2x6 3x6 4x6 5x6 12:2 18:3 24:4 30:5 2x7 3x7 4x7 5x7 14:2 21:3 28:4 35:5 2x8 3x8 4x8 5x8 16:2 24:3...
Đọc tiếp
tính nhẩm:
2x1= 3x1= 4x1= 5x1= 2:2= 3:3= 4:4= 5:5=
2x2= 3x2= 4x2= 5x2= 4:2= 6:3= 8:4= 10:5=
2x3= 3x3= 4x3= 5x3= 6:2= 9:3= 12:4= 15:5=
2x4= 3x4= 4x4= 5x4= 8:2= 12:3= 16:4= 20:5=
2x5= 3x5= 4x5= 5x5= 10:2= 15:3= 20:4= 25:5=
2x6= 3x6= 4x6= 5x6= 12:2= 18:3= 24:4= 30:5=
2x7= 3x7= 4x7= 5x7= 14:2= 21:3= 28:4= 35:5=
2x8= 3x8= 4x8= 5x8= 16:2= 24:3= 32:4= 40:5=
2x9= 3x9= 4x9= 5x9= 18:2= 27:3= 36:9= 45:5=
2x10= 3x10= 4x10= 5x10= 20:2= 30:3= 40:4= 50:5=
Help!