tolong di jawab soal matematika nya

7.) 2.752-1.452=1.300+157=1.457

8.) 625+144=769

9.) 289-225=514

10.) -150+75-23=-98

1.0,5x0,25=0,125
2.1/4x25%=1/4x1/4=1/4(jawabanya)
3.3,25x2/4=13/4x1/2=26/4=13/2=6 1/2
4.(Skip)
5.4/7x3/2=4/7x3/2=6/7
(No.5 pake sistem coret)