I'll solve each division problem step by step.
Problem a: 0.4)1.28
Step 1: Move the decimal in the divisor (0.4) one place to the right to make it 4
Step 2: Move the decimal in the dividend (1.28) one place to the right to make it 12.8
Step 3: Divide 12.8 ÷ 4
Let me calculate: 12.8 ÷ 4 = 3.2
Check: 4 × 3.2 = 12.8 ✓
Problem b: 0.03)0.54
Step 1: Move the decimal in the divisor (0.03) two places to the right to make it 3
Step 2: Move the decimal in the dividend (0.54) two places to the right to make it 54
Step 3: Divide 54 ÷ 3
Let me calculate: 54 ÷ 3 = 18
Check: 3 × 18 = 54 ✓
Problem c: 0.9)3.96
Step 1: Move the decimal in the divisor (0.9) one place to the right to make it 9
Step 2: Move the decimal in the dividend (3.96) one place to the right to make it 39.6
Step 3: Divide 39.6 ÷ 9
Let me calculate: 39.6 ÷ 9 = 4.4
Check: 9 × 4.4 = 39.6 ✓
Problem d: 7)38.5
The divisor is already a whole number, so we just divide directly.
Let me calculate: 38.5 ÷ 7
38.5 ÷ 7 = 5.5
Check: 7 × 5.5 = 38.5 ✓
Final Answer:
a. 3.2
b. 18
c. 4.4
d. 5.5
Parent Tip: Review the logic above to help your child master the concept of divide decimal by decimal worksheet.