50 + 50 + 50 + 50 + 50 + 50 + 50 + 50 + 50 + 50
Tính nhanh:
a) 50+50+50+50+50+50+50+50+50+50+50+50=?
b) 100+100+100+100+100+100+100+100+100=?
50 + 50 - 50 * 50 = .....?
50+50-50-50=
tính nhanh:
20 + 20 + 20 + 20 + 20 + 50 + 50 + 50 + 50=
tìm x :
\(x+50-20=50+20\)
x + 50 = 50 + 50
x + 20 = 50 + 50 + 50
50-50-50+100-90+58-60=?
50+50=100
50+60=?
Điền > < =
(87 + 3) : 3 ........ 30
25 + (42 – 11) ........ 55
100 ........ 888 : (4 + 4)
50 ........ (50 +50) : 5