x + 60 = 100 - 40
x + 60 = 60
x = 60 - 60
x = 0
x + 60 = 100 - 40
x + 60 = 60
x = 60 - 60
x = 0
x + 60 = 100 - 40
x + 60 = 60
x = 60 - 60
x = 0.
x+60=100-40
x+60=60
x=60-60
x=0
x+60=100-40
x+60=60
x=60-60
x=0
k minh nha!!!
x + 60 = 100 - 40
x + 60 = 60
x = 60 - 60
x = 0
x + 60 = 100 - 40
x + 60 = 60
x = 60 - 60
x = 0
x + 60 = 100 - 40
x + 60 = 60
x = 60 - 60
x = 0.
x+60=100-40
x+60=60
x=60-60
x=0
x+60=100-40
x+60=60
x=60-60
x=0
k minh nha!!!
60 + 40 + x = 200 + 100
20 × 20
40 × 40
60 × 60
80 × 80
100 × 100
20 × 20
40 × 40
60 × 60
80 × 80
100 × 100
tìm X biết :
a) x+60+40=200
b) (x+25)+50=100:2+30
60 x 2 = ?
50 x 2 = ?
40 x 2 = ?
90 x 2 = ?
100 x 2 = ?
Tính giá trị của biểu thức:
a) 90 – ( 30 – 20) = ..........................
= ..........................
90 – 30 – 20 = ..........................
= ..........................
b) 100 – (60 + 10) = ..........................
= ..........................
100 - 60 + 10 = ..........................
= ..........................
c) 135 – (30 + 5) = ..........................
= ..........................
135 – 30 – 5 = ..........................
= ..........................
d) 70 + (40 – 10) = ..........................
= ..........................
70 + 40 – 10 = ..........................
= ..........................
10+20+30+40+50+60+70+80+90+100=..................
10 + 20 + 30 + 40 + 50 + 60 + 70 + 80 + 90 +100 + 200 + 300 =
Tính nhẩm:
a) 400 + 300 =
700 – 300 =
700 – 400 =
b) 500 + 40 =
540 – 40 =
540 – 500 =
c) 100 + 20 + 4 =
300 + 60 + 7 =
800 + 10 + 5 =