Multiplication 1
1a standard algorithm
504
1a area model (boxes)
504 square units (use area model)
1b area model (boxes)
5082 square units (use area model)
1b standard algorithm
5082
2a area model only
6908 square units (use area model)
2a standard algorithm only
6908
2b area model and standard algorithm
9086 square units (use area model)
Word problem 4
$142 per shift
12 shift
142 x 12 = total amount earned
12 = 10 + 2
142 x (10 + 2)
(142 x 10) + (142 x 2)
1420 + 284
Zenin's pay would be $1704.
Show it with the box method as well.
2c area model and standard algorithm
6816 square units (use area model)
Word problem 3
Young snake is 0.23 meters long
Lifetime is 13 times as long
0.23 x 13 = total length when fully grown
10 + 3 = 13
0.23 x (10 + 3)
(0.23 x 10) + (0.23 x 3)
2.3 + 0.69
2.99
The snake would be 2.99 meters long.