Answers − Long Multiplication − Box Method
1. 23 × 97 =
(a) create a table: with 20 and 3 in the first row; and 90 and 7 in the first column
(b) complete the remaining cells by multiplying as follows:

(c) add up all the values that were multiplied in second step above:
1800 
270 
140 
+ 21 
 
2231 
2. 475 × 88 =
(a) create a table: with 400, 70 and 5 in the first row; and 80 and 8 in the first column
(b) complete the remaining cells by multiplying as follows:

(c) add up all the values that were multiplied in second step above:
32000 
5600 
400 
3200 
560 
+ 40 
 
41800 
3. 576 × 72 =
(a) create a table: with 500, 70 and 6 in the first row; and 70 and 2 in the first column
(b) complete the remaining cells by multiplying as follows:

(c) add up all the values that were multiplied in second step above:
35000 
4900 
420 
1000 
140 
+ 12 
 
41472 
4. 1783 × 37 =
(a) create a table: with 1000, 700, 80 and 3 in the first row; and 30 and 7 in the first column
(b) complete the remaining cells by multiplying as follows:

(c) add up all the values that were multiplied in second step above:
30000 
21000 
2400 
90 
7000 
4900 
560 
+ 21 
 
65971 
5. 684 × 47 =
(a) create a table: with 600, 80 and 4 in the first row; and 40 and 7 in the first column
(b) complete the remaining cells by multiplying as follows:

(c) add up all the values that were multiplied in second step above:
24000 
3200 
160 
4200 
560 
+ 28 
 
32148 
6. 786 × 77 =
(a) create a table: with 700, 80 and 6 in the first row; and 70 and 7 in the first column
(b) complete the remaining cells by multiplying as follows:

(c) add up all the values that were multiplied in second step above:
49000 
5600 
420 
4900 
560 
+ 42 
 
60522 
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