Solve the following arithmetic problems: Work these out in your head: a) 18 + 28 = ? b) 8 x 9 = ? c) 26 + 32 = ? d) 890 / 10 = ? e) 25 x 4 = ? f) 87 / 5 = ? g) 5000 - 30 = ? Circle the correct answer.

Here are the solutions to the problems:

1. Work these out in your head:

• a) $18 + 28 = \boxed{46}$
• b) $8 \times 9 = \boxed{72}$
• c) $26 + 32 = \boxed{58}$
• d) $890 \div 10 = \boxed{89}$
• e) $25 \times 4 = \boxed{100}$
• f) $87 \div 5$. $$87 = 5 \times 17 + 2$$ The remainder is $\boxed{2}$.
• g) $5 \times 1000 = 5000$ $5000 - 30 = \boxed{4970}$

2. Circle the correct answer.

• a) Another word for addition is:
  • iii. plus
• b) Minus means the same as:
  • i. subtraction
• c) One million has ____ zeros.
  • One million is 1,000,000.
  • iii. 6
• d) The product of 20 and 200 is:
  • $20 \times 200 = 4000$
  • ii. 4 000
• e) When adding or subtracting, if a number ends with a 9 round it off to the next 10, and then take away or add ____.
  • When you round a number ending in 9 up to the next 10 (e.g., 29 to 30), you add 1. To correct the sum or difference, you must then adjust by subtracting 1.
  • iii. 1
• f) 62 r 3. The r stands for:
  • i. remainder