12+12+12+12+12+12+12+12+12+12+12-121-1
12 + 12 + 12 + 12 + 12 + 12 + 12 = 12 * ?
Tính nhẩm:
12 − 8 = ..... 12 − 6 = .....
12 − 7 = ..... 12 − 9 = .....
12 − 4 = ..... 12 − 3 = .....
12 − 5 = ..... 12 − 2 = .....
Tính
12 + 12 - 12 + 12 - 12
Tìm x:
12+12+x+12+12=65
12*(12+11)-12*(12-11)
Giúp mình nha!
12+12+12
12+12+12+....=42
12+15-12+12=?