standard_description: Add up to four two-digit numbers using strategies based on place value and properties of operations.
problem_activity: Solve.
a.   7 × 10 = _______
b.   100 × 7 = _______
c.   _______ = 7 × 1,000
d.   10 × 3 = _______
e.   1,000 × 30 = _______
f.   _______ = 10 × 30
g.   100 × 14 = _______
h.   _______ = 10 × 25
i.   54 × 1,000 = _______


aligns: no