20 + x + 30 + 40 = 100
20 + x + 30 = 100 - 40
20 + x + 30 = 60
20 + x = 60 - 30
20 + x = 30
x = 30 - 20
x = 10
X + 20 + 30 + 40 = 100
X + 90 = 100
X = 100 - 90
X = 10
20+x+30+40=100
20+x+30 =100-40
20+x+30 =60
20+x =60-30
20+x =30
x =30-20
x =10
20 + x + 30 + 40 = 100
20 + x + 30 = 100 - 40
20 + x + 30 = 60
20 + x = 60 - 30
20 + x = 30
x = 30 - 20
x = 10
X + 20 + 30 + 40 = 100
X + 90 = 100
X = 100 - 90
X = 10
20+x+30+40=100
20+x+30 =100-40
20+x+30 =60
20+x =60-30
20+x =30
x =30-20
x =10
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 nhanh
100 + 200 + 300 + 400 + 500 = ?????
10 + 20 + 30 + 40 + 50 = ???
tính nhanh ;
10 + 20 + 30 + 40 + 50 + 60 + 70 + 80 + 90 + 100
tk nhé
10 + 20 + 30 + 40 + 50 + 60 + 70 + 80 + 90 + 100 = ?
ai nhanh nhất mình tick cho.
x + 40 = 20 + 30
10 + 30 + 70 + 20 +40 x 0 =
Điền > < =
69 245 ...... 69 260
73 500 ...... 73 499
60 000 ...... 59 000 + 1000
70 000 + 30 000 ...... 100 000
20 000 + 40 000 ...... 60 600
80 000 + 8000 ...... 80 900