Giup minh giai bai toan nay voi
Khong thuc hien phep tinh xet xem tich sau co tan cung bang chu so nao
a.2*12*22*32*...*2012
b.3*13*23*...*2013
c.4*14*24*...*2004
d.2*12*22*...*2020
Cac ban giai ro giup minh nha.Minh cam on
Thuc hien cac phep tinh sau ;a] [5/6 + 6/9 ] * 3/11
b] [ 7/6 - 1/4 ] \ 3/4
Thuc hien phep tinh sau bang cach hop li nhat:
a)5/11+1/2+2/5+6/11+3/4+16/25+5/16
b)19/4+37/100+1/8+132/25+5/2+37/12
khi thuc hien phep cong hau so vi so y nen mot hoc sinh da viet sai o hang don vi cua so hang thu nhat 2 thanh 9 o hang chuc 4 thanh 7 vi the tong tim duoc la 750 hay tim tong dung cua phep cong do
khi thuc hien phep nhan 1 STN voi127 ,do nham lan nen ban An da viet chu so 7 o HDV cua thua so thu
2 thanh chu so 4 nen tich giam di1245 DV.Tich dung la
khi thuc hien mot phep nhan ban mai da viet nham chu so 4 o hang don vi cua mot thua so thanh chu so1 cho do ket qua tim duoc la 1755 .tim cac thua so dung cua phep nhan do.biet tich dung la 1770
ai nhanh tick cho 3 tick
khi thuc hien mot phep nhan 2 so, mot ban hoc sinh viet nham chu so 4 o hang don vi cua mot thua sothanh chu so 1 ,vi the ban do da tim ra ket qua la 525.hay tim hai so da cho biet tich dung la 600
1) Tim A , biet :
(242 / 363 - 1616 / 2121) = 2 / 7 x A
2)Thuc hien phep tinh :
99 / 98 - 98 / 97 + 1 / 97 x 98
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
