72 x 121 + 27 x 121 + 121
= (72 + 27 + 1) x 121
= 100 x 121
= 12 100
72 x 121 + 27 x 121 + 121
= (72 + 27 + 1) x 121
= 100 x 121
= 12 100
tinh nhanh
a.48x19+48x115+134x52
b.27x121-87x27+73x34
c.125x98-125x46-52x25
d.136x23+136x17-40x36
e.17x93+116x83+17x23
g.19x27+47x81+19x20
h,87x23+13x93+70x87
27x121-87x27+73x34= ?
41x30+59x90+41x84+59x30
27x121-87x27+73x34
72.121+27.121+121 tinh nhanh
4+7+10+...+118+121+124+126.Cho minh hoi phep tinh gap!!!
tinh nhanh 1500-{5^3.2^3-11.[7^2-5.2^3+8.(11^2-121)]}
tinh gia tri bieu thuc
2875:23-1936:121+26*173-26*73
tinh bang cach hop li
(-8).25.(-375).(-4).125
(-19).8+(-19).(-3)
(-137)+76.(-137)+(-137).23
24.(-21)+(-121).(-24)
3 lop co 121 hoc sinh . Lop 6A bang \(\frac{8}{9}\) so hoc sinh lop 6B,lop 6c bang 9/20 so hoc sinh lop 6a .tinh so hoc sinh moi lop?