CBSE Class 5 Mathematics Ways To Multiply And Divide Worksheet Set 03

Multiply

Question 1(a). \(39 \times 2\)
Answer: \(39 \times 2 = 78\)
In simple words: Multiply 39 by 2 to get 78.

Exam Tip: You can also think of this as \((30 \times 2) + (9 \times 2) = 60 + 18 = 78\).

Question 1(b). \(39 \times 20\)
Answer: \(39 \times 20 = 780\)
In simple words: Since 20 is 10 times 2, multiply 78 by 10 to get 780.

Exam Tip: When multiplying by a multiple of 10, multiply the non-zero digits first, then append one zero.

Question 1(c). \(39 \times 200\)
Answer: \(39 \times 200 = 7800\)
In simple words: Since 200 is 100 times 2, multiply 78 by 100 to get 7800.

Exam Tip: Append two zeros to the product of 39 and 2.

Question 2(a). \(97 \times 7\)
Answer: \(97 \times 7 = 679\)
In simple words: Multiply 97 by 7 to get 679.

Exam Tip: Use the distributive property: \((90 \times 7) + (7 \times 7) = 630 + 49 = 679\).

Question 2(b). \(97 \times 70\)
Answer: \(97 \times 70 = 6790\)
In simple words: Multiply 97 by 7 and put a zero at the end to get 6790.

Exam Tip: Keep track of place values when multiplying by multiples of 10.

Question 2(c). \(97 \times 700\)
Answer: \(97 \times 700 = 67900\)
In simple words: Multiply 97 by 7 and put two zeros at the end to get 67900.

Exam Tip: Check your final answer by counting the correct number of trailing zeros.

II Divide and find the quotient

Question 3(a). \(20 \div 10\)
Answer: \(20 \div 10 = 2\)
In simple words: Dividing 20 into groups of 10 gives 2.

Exam Tip: Cancel the trailing zeros: \(20 \div 10 = 2 \div 1 = 2\).

Question 3(b). \(70 \div 10\)
Answer: \(70 \div 10 = 7\)
In simple words: Dividing 70 by 10 gives 7.

Exam Tip: Removing one zero from both numbers simplifies the division.

Question 3(c). \(760 \div 2\)
Answer: \(760 \div 2 = 380\)
In simple words: Half of 760 is 380.

Exam Tip: Divide 76 by 2 to get 38, then attach the zero.

Question 3(d). \(540 \div 40\)
Answer: \(540 \div 40 = 13.5\) (or \(13\) remainder \(20\))
In simple words: Divide 54 by 4 to get 13.5.

Exam Tip: Cancel the trailing zeros first: \(54 \div 4 = 13.5\).

Question 3(e). \(539 \div 3\)
Answer: \(539 \div 3 = 179\) with a remainder of \(2\) (or \(179\frac{2}{3}\))
In simple words: 539 divided by 3 is 179 with 2 left over.

Exam Tip: Check using multiplication: \((179 \times 3) + 2 = 537 + 2 = 539\).

Question 3(f). \(7000 \div 7\)
Answer: \(7000 \div 7 = 1000\)
In simple words: Seven thousand divided by seven is one thousand.

Exam Tip: \(7 \div 7 = 1\), then keep the three zeros.

Question 3(g). \(434 \div 2\)
Answer: \(434 \div 2 = 217\)
In simple words: Half of 434 is 217.

Exam Tip: Halve each digit: half of 400 is 200, half of 30 is 15, half of 4 is 2. Total = \(200 + 15 + 2 = 217\).

Question 3(h). \(999 \div 9\)
Answer: \(999 \div 9 = 111\)
In simple words: 999 divided into 9 equal parts is 111.

Exam Tip: Divide each place value by 9: \(900 \div 9 = 100\), \(90 \div 9 = 10\), \(9 \div 9 = 1\). Total = 111.

Question 3(i). \(420 \div 4\)
Answer: \(420 \div 4 = 105\)
In simple words: 420 divided by 4 gives 105.

Exam Tip: Notice that \(400 \div 4 = 100\) and \(20 \div 4 = 5\), so \(100 + 5 = 105\).

Question 3(j). \(280 \div 7\)
Answer: \(280 \div 7 = 40\)
In simple words: 28 divided by 7 is 4, so 280 divided by 7 is 40.

Exam Tip: Use basic multiplication facts: \(7 \times 40 = 280\).

Question 3(k). \(624 \div 4\)
Answer: \(624 \div 4 = 156\)
In simple words: 624 divided by 4 is 156.

Exam Tip: Break it down: \((400 \div 4) + (200 \div 4) + (24 \div 4) = 100 + 50 + 6 = 156\).

Question 3(l). \(1000 \div 4\)
Answer: \(1000 \div 4 = 250\)
In simple words: One thousand divided by 4 is 250.

Exam Tip: Remember that four 255 make 100, so four 250s make 1000.