Calculate and verify in the reverse operation:
7x4=28 5x7= 1 949 + 1 527 =
40 : 5 =
985 + 2 985 =
21:3 =
34 + 3 090 =
9 x 3 = 4 321 + 1 999 =
7:7 =
0:9=
500 + 4 500 =
32 : 8 =
9 x 6 =
54:9=
100 -
3 =
1 000 - 95 =
4 900 - 1540
6 100 - 3 294 =
10 000 -6 987 =​