Multiplying Decimals with Whole Number
How to Multiply Decimals with Whole Number?
Step 1: Multiply the hundredths.
Step 2: Multiply and add the tenths.
Step 3: Multiply and add the ones.
See working examples below.
Step 2: Multiply and add the tenths.
Step 3: Multiply and add the ones.
See working examples below.
1. Bob had 3 packets of butter each containing 0.4 kg butter.
How much butter did Bob have altogether?
Method 1:
0.4 + 0.4 + 0.4 = 1.2 kg
Bob had 1.2 kg of butter altogether.
Method 2:
Multiply 0.4 kg by 3.
0.4 × 3 = ?
Bob had 1.2 kg of butter altogether.
0.4 + 0.4 + 0.4 = 1.2 kg
Bob had 1.2 kg of butter altogether.
Method 2:
Multiply 0.4 kg by 3.
0.4 × 3 = ?
Bob had 1.2 kg of butter altogether.
2. Bob had 3 cartons of milk each containing 0.45 L of milk.
How much milk did Bob have altogether?
Multiply 0.45 L by 3.
0.45 × 3 = ?
Bob had 1.35 L of milk altogether.
0.45 × 3 = ?
Bob had 1.35 L of milk altogether.
3. Bob had 7 bags of flour each containing 1.85 kg flour.
How much flour did Bob have altogether?
Multiply 1.85 kg by 7.
1.85 × 7 = ?
Bob had 12.95 kg of flour altogether.
1.85 × 7 = ?
Bob had 12.95 kg of flour altogether.
4. Serena bought 5 drawing books for $4.25 each.
How much did she spend on the drawing books altogether?
Cost of 1 drawing book = $4.25
Cost of 5 drawing books = $4.25 × 5
= $21.25
She spent $21.25 on the drawing books altogether.
= $21.25
She spent $21.25 on the drawing books altogether.
