Question

there are three groups of cube models. the first group: 5 long strips of cubes (each strip has several small cubes), 4 layers of square - shaped cube groups (each layer is a square of small cubes), and 5 layers of square - shaped cube groups. the second group: 3 single small cubes, 1 long strip of cubes, 4 layers of square - shaped cube groups, and 4 layers of square - shaped cube groups. the third group: 2 long strips of cubes, 3 layers of square - shaped cube groups, 3 layers of square - shaped cube groups, and 8 single small cubes. there are blank rectangles and underlines below each group, which are probably for writing the corresponding numbers or expressions.

Explanation:

Step1: Count first set of blocks

Large sheets (100 each): $4 + 4 = 8$, so $8 \times 100 = 800$; Rods (10 each): $5$, so $5 \times 10 = 50$; Total: $800 + 50 = 850$

Step2: Count second set of blocks

Large sheets (100 each): $4 + 3 = 7$, so $7 \times 100 = 700$; Rods (10 each): $1$, so $1 \times 10 = 10$; Singles (1 each): $3$, so $3 \times 1 = 3$; Total: $700 + 10 + 3 = 713$

Step3: Count third set of blocks

Large sheets (100 each): $3 + 3 = 6$, so $6 \times 100 = 600$; Rods (10 each): $2$, so $2 \times 10 = 20$; Singles (1 each): $8$, so $8 \times 1 = 8$; Total: $600 + 20 + 8 = 628$

Answer:

850
713
628