Tolong bantu jawab yahh

1. a 25+24:6-13
= 25+ (24:6)-13
=25+4-13
=29-13
=16
1.b 19-5x3+20:2
=19-(5x3)+(20:2)
=19-15+10
=4+10
=19
1.c 45:5+(-2)x3
=(45:5)-(2x3)
=9-6
=3
1.d 13x3-25:5+(-5)
=(13x3)-(25:5)+(-5)
=39-5-5
=29
gatau ya kalo salah hehe^^