B. Pick up the different numbers found in the hearts below, Arrange and fill in the boxes that will give the greatest or smallest product.
7 6 5 4 3 2
3-digit by 1-digit
1.) Greatest
□□□
×. □
2..Smallest Product
□□□
×. □
3-digit by 2-digit
3.Smallest product
□□□
× □□
4-digit by 2-digit
□□□□
×. □□
Example
3×98 14×99
=3×(100-2) =14×(100-1)
=300-6 =14×100-14×1
=294 =1400-14
=1386
1. 17×33+17×7
= 17×(____+____)
=
=
2. 23×48-23×28
=23×(_____-_____)
=
=
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Answer:
1. 17x33+17x7
= 17x(100-67) =17x(100-93)
=1,139-67 =17x100-17x93
=1,072 =1,700-76
=1,624
2. 23x48-23x28
=23x(100-52) 23x(100-72)
=1,196-52 =23x100-23x72
=1,144 =2,300-49
=2,251