a. 34 + 23 + 512
912 + 812 + 512 = 2212
b. 78 - 716 - 1132
= 2832 - 1432 - 1132 = 332
c. 35 x 27 x 56
= 3x2x55x5x7 = 30210
d. 1516: 38 x 34
1516 x 38 x 34
= 15x8x34x16x3 = 360192 = 158