a, 476 - 424 + 36 : 4
= 476 - 424 + 9
= 52 + 9
= 61
b, 876 - 4 x 8 - 423
= 876 - 32 - 423
= 844 - 423
= 421
c, 624 + 242 - 852 + 78
= 866 - 852 + 78
= 14 + 78
= 92
d, 40 : 5 : 2 x 7
= 8 : 2 x 7
= 4 x 7
= 28
a) 476 - 424 + 36 : 4
= 476 - 424 + 9
= 52 + 9
= 61
b) 876 - 4 x 8 - 423
= 876 - 32 - 423
= 844 - 423
= 421
c) 624 + 242 - 852 + 78
= 866 - 852 + 78
= 14 + 78
= 92
d) 40 : 5 : 2 x 7
= 8 : 2 x 7
= 4 x 7
= 28