11. Find the value of 36 tens + 2 hundreds + 56 ones —105 ones.
12. What number is modelled in the place-value chart below? (• represents 1)
13. If “−” means “+”, “+” means “−”, “×” means “÷”, and “÷” means “×”. What number should be placed in the box to make the following number sentence correct?
14. If
❺ = 10,
❹ = 14
❻ = 16.
Find the value of ❻ + ❻ + ❹ + ❺ − ❻
15. The blue and red bocks are stacked in an alternating position to form the figure below. How many blue blocks are there?