Sara's pencil is 12 cm long. Her ruler is 30 cm long. How much LONGER is the ruler than the pencil?
Show Worked Solution
Worked Solution
Step 1: 'How much longer' means subtract the shorter length from the longer length.
Step 2: 30 − 12 = ?
Step 3: Borrow 1 ten: 30 becomes 2 tens and 10 ones. 10 − 2 = 8 (ones), 2 − 1 = 1 (ten). So 30 − 12 = 18 cm.
Answer: 18 cm
Correct answer: 18 cm
Want more questions like this? Superholic Lab has 10,000+ MOE-aligned questions with full worked solutions.
Start Free Trial — 7 Days Free