Ket qua cua day tinh:1*2*3*4*5*6*7+64:8 co tan cung la chu so nao?
tim chu so tan cung cua phep tinh 2x3x4x5x6+42:7
lan thuc hien 1 phep nhan do viet nham chu so hang don vi cua thua so thu 2 tu 2 thanh 8 nen da duoc ket qua la 2034 ma dang le phai la 1356 em hay tim cac thua so ban dau cua phep tinh do
tim chu so tan cung cua phep tinh tren:
22*27*46+58+45*47*49
Tim chu so tan cung cua phep tinh
22*27*46+58+45*47*49
khong lam phep tinh ,hay cho biet ket qua cua moi phep tinh sau co tan bang chu so nao ?giai thich tai sao?
a.2*4*6*8...*96*98*5
b.5*15*25*...*2025
c.59*69*79*89-21*41*61*81
d.4*14*24*...*2024
khi nhan mot so voi 305, mot ban da dat cac tinh rieng thang cot nhu trong phep cong.Do do ket qua nhan duoc la 3400.Hay tim tich dung cua phep nhan nay
Tim 1 so tu nhien biet khi viet them chu so 4 vao tan cung cua so do ta duoc so moi hon so can tim la 1111 don vi . viet ra tung phep tinh gium cho
khi thuc hien phep nhan 2 thua so, mot ban da viet nham 2 chu so cuoi cung cua thua so thu 1 la 35 thanh 53 nen co ket qua la 22197.tim 2 thua so da cho, biet rang tich dung cua chung la 21315