(753*202)+(404*909)=
1)753*202=152106
2)404*909=205636
3)152106+205636=357742
105*50,81*38,66*36,50*23,47*14,3*7.
40,
1) 3 2/15 * (2 3/4 - 1,75) = 3 2/15 * 1 = 3 2/15
2) 8 3/4 *(2 1/5 + 7 4/5) = 8 3/4 * 10 = 87,5
3) 5,3 * (7 2/3 - 2/3) = 5,3 * 7 = 37,1
4) 7 1/4 * (1,2 + 8,8) = 7 1/4 * 10 = 72,5