We will learn how to multiply 2-digit numbers by 2-digit numbers.
Multiplying 2-Digit Numbers by 2-Digit Numbers
Multiplication 2-Digit Numbers × 2-Digit Numbers:
I. Multiply 44 by 18.
T O 4 4 × 1 8 3 5 2 1. + 4 4 0 2. 7 9 2 3. |
1. 18 = 1 ten and 8 ones Multiply 8 ones by both numbers 44 × 8 ones = 352 ones 2. Multiply 1 ten by both numbers 44 × 1 ten = 44 tens = 440 tens 3. Add the two products 352 + 440 = 792 |
Thus, 44 × 18 = 792
II. Multiply 32 by 23.
T O 3 2 × 2 3 9 6 1. + 6 4 2. 7 3 6 3. |
1. 23 = 2 tens and 3 ones Multiply 3 ones by both numbers 32 × 3 = 96 ones 2. Multiply 2 tens by both numbers 32 × 2 = 64 tens = 6 hundreds, 4 tens 3. Add the two products and write as - 96 + 640 = 736 |
Thus, 32 × 23 = 736
Multiplying by 2-digit Numbers:
III. Multiply 64 by 23.
Solution:
Step 1. Arrange the numerals as shown
Step 2. Multiply 64 by 3 ones
64 × 3 = 192 ones
Step 3. Multiply 64 by 2 tens
64 × 2 tens = 128 tens
= 1280
Step 4. Add both the products
192 + 1280 = 1472
Thus, 64 × 23 = 1472
REMEMBER:
The product of a 2-digit number by another 2- digit number cannot be more than 4-digits.
1. There are 36 flowers in a garland. How many flowers are there in 25 such garlands?
Solution:
Number of flowers in a garland = 36
Number of flowers in 25 garlands = 36 × 25 = 900
Thus, 900 flowers are there in 25 garlands.
1. Multiply the Following 2-Digit Numbers:
(i) H T O 2 4 × 1 1 ____________ ____________ ____________ |
(ii) H T O 3 4 × 1 2 ____________ ____________ ____________ |
(iii) H T O 2 9 × 1 3 ____________ ____________ ____________ |
(iv) H T O 4 1 × 1 4 ____________ ____________ ____________ |
(v) H T O 5 2 × 1 5 ____________ ____________ ____________ |
(vi) H T O 4 1 × 1 7 ____________ ____________ ____________ |
(vii) H T O 2 9 × 1 8 ____________ ____________ ____________ |
(viii) H T O 4 4 × 2 0 ____________ ____________ ____________ |
(ix) H T O 4 1 × 2 2 ____________ ____________ ____________ |
(x) H T O 5 1 × 2 9 ____________ ____________ ____________ |
(xi) H T O 9 6 × 3 1 ____________ ____________ ____________ |
(xii) H T O 3 5 × 4 1 ____________ ____________ ____________ |
Answer:
1. (i) 264
(ii) 408
(iii) 377
(iv) 574
(v) 780
(vi) 697
(vii) 522
(viii) 880
(ix) 902
(x) 1479
(xi) 2976
(xii) 1435
2. Multiply the given 2-Digit Numbers by 2-Digit Numbers:
(i) H T O 8 3 × 1 2 ____________ ____________ ____________ |
(ii) H T O 2 9 × 1 5 ____________ ____________ ____________ |
(iii) H T O 4 2 × 1 8 ____________ ____________ ____________ |
(iv) H T O 3 2 × 1 3 ____________ ____________ ____________ |
(v) H T O 7 3 × 1 0 ____________ ____________ ____________ |
(vi) H T O 6 6 × 1 0 ____________ ____________ ____________ |
(vii) H T O 5 4 × 1 4 ____________ ____________ ____________ |
(viii) H T O 4 3 × 2 0 ____________ ____________ ____________ |
(ix) H T O 2 7 × 2 6 ____________ ____________ ____________ |
(x) H T O 2 4 × 1 1 ____________ ____________ ____________ |
(xi) H T O 1 6 × 5 0 ____________ ____________ ____________ |
(xii) H T O 1 6 × 1 2 ____________ ____________ ____________ |
Answer:
2. (i) 996
(ii) 435
(iii) 756
(iv) 416
(v) 730
(vi) 660
(vii) 756
(viii) 860
(ix) 702
(x) 264
(xi) 800
(xii) 192
3. Do these Sums in your Notebook:
(i) 18 x 17
(ii) 28 x 16
(iii) 44 x 14
(iv) 61 x 15
(v) 73 x 17
(vi) 63 x 35
(vii) 93 x 18
(viii) 42 x 23
(ix) 45 x 29
(x) 47 x 32
(xi) 19 x 38
(xii) 39 x 28
(xiii) 41 x 41
(xiv) 88 x 42
(xv) 17 x 43
(xvi) 12 x 62
(xvii) 23 × 25
(xviii) 10 x 45
(xix) 33 x 71
(xx) 27 x 82
(xxi) 22 × 87
(xxii) 44 x 87
(xxiii) 21 × 91
(xxiv) 31 × 92
Answer:
3. (i) 306
(ii) 448
(iii) 616
(iv) 915
(v) 1241
(vi) 2205
(vii) 1674
(viii) 966
(ix) 1305
(x) 1504
(xi) 722
(xii) 1092
(xiii) 1681
(xiv) 3696
(xv) 731
(xvi) 744
(xvii) 575
(xviii) 450
(xix) 2343
(xx) 2214
(xxi) 1914
(xxii) 3828
(xxiii) 1911
(xxiv) 2852
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